Custom Engagement Ring Bangkok

PERSONALIZE YOUR LOVE STORY

Custom Lab Grown Diamond Engagement Rings in Bangkok

A ring designed around your story — from the center diamond to the smallest hidden detail. Choose your diamond, setting, precious metal and personalized details, then review your 3D CAD design before production begins. Private consultations are available at Sphere Diamond, CentralWorld Bangkok.

Start Your Custom Ring Book a Private Consultation
Custom lab grown diamond engagement ring consultation at Sphere Diamond CentralWorld Bangkok
DIAMONDSIGI-Graded Options for Eligible Center Diamonds
DESIGNCAD Review Before Production
MATERIALS18K Gold & Platinum
BANGKOKCentralWorld Boutique
CARELifetime After-Sales Care
Client choosing a diamond and design for a custom engagement ring at Sphere Diamond Bangkok

YOUR STORY, YOUR RING

A Custom Ring Begins With Your Story

Client choosing a diamond and design for a custom engagement ring at Sphere Diamond Bangkok

A custom engagement ring is more than choosing a diamond and a setting. It is an opportunity to create something that reflects the person who will wear it, the relationship it represents and the details that matter to you both.

Some clients arrive knowing exactly what they want. Others come with a saved photograph, a celebrity ring they admire, a family piece they want to reinterpret, or simply a preferred diamond shape.

You do not need to arrive with a finished design. Bring us your idea, inspiration image or even just the feeling you want the ring to have. Our team will help translate that inspiration into a design that is beautiful, wearable and structurally considered.

DESIGN EVERY DETAIL

Design Every Detail of Your Engagement Ring

From the center diamond to the smallest finishing detail, your ring can be tailored to your preferences, lifestyle and budget.

01

Diamond Shape

Round, Oval, Emerald, Pear, Radiant, Cushion, Marquise, Princess, Asscher and Heart.

02

Carat & Quality

Choose the carat, color, clarity and proportions that make sense for your priorities and budget.

03

Setting

Solitaire, cathedral, hidden halo, halo, bezel, three-stone, pavé or a bespoke setting.

04

Precious Metal

18K white gold, yellow gold, rose gold or platinum.

05

Proportions

Refine band width, thickness, setting height, prongs and profile where structurally appropriate.

06

Personal Details

Add engraving, initials, meaningful dates or discreet details that make the ring yours.

THE CUSTOM PROCESS

How We Create Your Custom Engagement Ring in Bangkok

From your first consultation through CAD approval, production and final quality control, every stage is designed to make the process clear before your ring becomes the finished piece.

STEP 01

The Initial Consultation

The first step is understanding the vision for your ring — including style, budget, timeline, diamond preferences, ring size and any personal details you would like incorporated into the design.

But before discussing millimeters, prongs or carat weight, we want to understand something more important: your story.

If you already have a photograph of a ring you love, send it to us. Our team can identify the elements you are drawn to and use them as a starting point for a design personalized to your diamond, proportions, lifestyle and story.

  • Preferred diamond shape and carat size
  • Setting style and band proportions
  • 18K Gold or Platinum
  • Wedding-band compatibility
  • Engraving or hidden details
  • Budget and proposal / collection date
You do not need to arrive with a finished design. That is what the consultation is for.
Private custom engagement ring consultation at Sphere Diamond Bangkok
STEP 02

Diamond Selection

After the consultation, the next step is selecting the center diamond. Sphere Diamond specializes in lab grown diamonds, allowing you to compare different shapes, carat sizes and quality combinations while considering both appearance and budget.

An IGI grading report provides important information such as carat weight, color, clarity and cut characteristics, but the certificate is only part of the decision. Two diamonds with similar grades can still look different because of proportions, light performance and outline.

We therefore consider Cut & Light Performance, Shape & Proportion, Color, Clarity and Face-Up Size — and most importantly, how the diamond actually looks to you.

Where available, compare sizes in person — for example 1.00 ct → 1.50 ct → 2.00 ct → 2.50 ct → 3.00 ct — so you can judge scale on your own hand rather than imagining it from a photograph.
Comparing lab grown diamond shapes and carat sizes for a custom engagement ring
STEP 03

Custom Design & 3D CAD Rendering

Once the center diamond is selected and the design direction is established, we create a precise 3D CAD model of the engagement ring.

CAD allows us to evaluate band width and thickness, setting height, prong placement, gallery construction, hidden halo proportions, accent-stone placement and wedding-band clearance before the ring is physically produced.

This is also where meaningful details can be incorporated — such as engraving, initials, an important date or a discreet design element known only to the wearer.

Nothing moves forward until the design is approved.
Clients can review the CAD from multiple angles and request appropriate adjustments before production begins.
3D CAD rendering for a custom lab grown diamond engagement ring by Sphere Diamond
STEP 04

3D Model & Proportion Review

After CAD approval, a physical 3D model may be created where appropriate for the design. It can provide another perspective on profile, setting height, band proportions and overall scale before the ring is produced in precious metal.

This stage acts as an additional checkpoint for evaluating how the approved digital design translates into three dimensions.

Three-dimensional model used to review custom engagement ring proportions
STEP 05

Casting, Craftsmanship & Stone Setting

Once the design is approved, the ring moves into production in your selected precious metal — including 18K white, yellow or rose gold, or platinum.

The piece is refined and prepared for stone setting. The center diamond and any accent stones are set according to the approved design, followed by finishing, polishing and any final engraving or personalized details.

Diamond setting during custom engagement ring production at Sphere Diamond Bangkok
STEP 06

Final Quality Control & Delivery

Before delivery, we review stone security, prong alignment, ring size, setting position, proportions, finishing, symmetry, engraving and personalized details against the approved design.

A custom ring should not simply look beautiful in a photograph. It should be designed and finished for real-world wear.

Final quality control for a custom engagement ring by Sphere Diamond

CHOOSE YOUR DIAMOND

Choose Your Diamond Shape

Your center diamond sets much of the personality and proportion of the finished ring. Compare shapes and sizes to find the one that feels right for you.

RoundClassic brilliance
OvalElongated elegance
EmeraldStep-cut sophistication
RadiantModern brilliance
PearGraceful silhouette
CushionSoft & romantic
MarquiseDramatic length
PrincessClean geometry
AsscherArt Deco character
HeartHighly personal
Explore Lab Grown Diamond Shapes

INSPIRATION → CAD → FINISHED RING

See Your Ring Before We Make It

One of the strongest advantages of a bespoke engagement ring is being able to see how an idea develops before the finished piece is produced.

Your inspiration becomes a design built around the actual dimensions of your selected diamond. The structure is developed through CAD, reviewed from multiple angles and approved before production begins.

Every custom ring shown here is developed from a real design journey — from inspiration and diamond selection to CAD development and the finished piece. This allows you to see how an initial idea can be refined into a ring created around your selected diamond and personal preferences.

REAL CUSTOM PROJECTS

Custom Engagement Ring Case Studies

Each case study follows the real custom-design journey in four visual stages, so you can see how an idea is refined around the selected diamond before becoming the finished ring.

Case Study 01 · Toi et Moi

Pear & Emerald Cut Toi et Moi in Yellow Gold

The Brief: Create a distinctive two-stone ring that brings contrasting diamond shapes together in one balanced composition.

Design Approach: The pear and emerald cut are positioned and proportioned around their actual dimensions, allowing the softer pear silhouette and architectural emerald cut to remain individually recognizable while reading as one design.

StyleToi et Moi
DiamondsPear + Emerald Cut
MetalYellow Gold
FocusBalance · Orientation · Proportion
Toi et Moi custom engagement ring inspiration for Sphere Diamond Bangkok
01Inspiration

Inspiration

The project begins with the idea of two contrasting diamond shapes sharing one composition rather than following a conventional single-center layout.

Pear and emerald cut diamond selection for a Toi et Moi engagement ring
02Diamond Selection

Diamond Selection

Pear and emerald-cut diamonds are considered together for scale, outline, orientation and the visual relationship between the two stones.

CAD development for a custom pear and emerald cut Toi et Moi ring
03CAD Development

CAD Development

The setting is developed around the actual stone dimensions so spacing, prong positions and the sculptural yellow-gold curves can be reviewed before production.

Finished pear and emerald cut Toi et Moi engagement ring in yellow gold
04Finished Ring

Finished Ring

The finished Toi et Moi design brings the soft pear silhouette and clean emerald-cut geometry together as one personalized ring.

Design takeaway

For a Toi et Moi ring, the relationship between the two diamonds matters as much as the individual stones. Shape, scale, spacing and orientation should be considered together before the setting is finalized.

Case Study 02 · Cushion

3 Carat Cushion Cathedral with Hidden Halo & Euro Shank

The Brief: Create a substantial cushion engagement ring with an elegant cathedral profile, discreet hidden sparkle and a structured yellow-gold shank.

Design Approach: Cathedral shoulders rise toward the center setting while a hidden halo adds detail below the face-up view. The Euro shank gives the base a more structured silhouette and the CAD stage allows profile and proportions to be reviewed before production.

Center3.00 ct Cushion
SettingCathedral + Hidden Halo
MetalYellow Gold
ShankEuro Shank
3 carat cushion cut diamond selection for a custom cathedral engagement ring at Sphere Diamond Bangkok
01Inspiration

Inspiration

The project begins with the selected 3 carat cushion diamond and the desired cathedral-ring direction, establishing the visual proportions and design language for the custom setting.

CAD proportion development for a 3 carat cushion cathedral engagement ring
02CAD & Proportion

CAD & Proportion

CAD is used to review cathedral height, hidden-halo placement, prong architecture and the Euro-shank geometry before metal production.

Casting and setting process for a 3 carat cushion cathedral engagement ring
03Casting & Setting

Casting & Setting

The approved design moves into yellow-gold production, followed by preparation, setting and finishing of the ring structure.

Finished 3 carat cushion cathedral engagement ring in yellow gold by Sphere Diamond
04Finished Ring

Finished Ring

The completed ring keeps the cushion diamond visually dominant while the cathedral profile and hidden halo reveal additional detail from the side.

Design takeaway

Large center stones benefit from considering the side profile as carefully as the face-up view. Cathedral shoulders, hidden-halo height and shank geometry can all affect the finished proportions.

Case Study 03 · Art Deco

3 Carat Oval Art Deco Ring in Platinum

The Brief: Bring together details from two vintage-inspired references into one personal ring rather than reproducing either reference exactly.

Design Approach: Art Deco geometry, tapered accents and milgrain are refined around the actual oval center stone. Platinum supports the crisp architectural character, while a hidden birthstone can add a private personal detail where technically appropriate.

Center3.00 ct Oval
MetalPlatinum
StyleArt Deco / Vintage
DetailsMilgrain · Hidden Birthstone
Art Deco engagement ring inspiration for a custom oval diamond ring by Sphere Diamond Bangkok
01Inspiration

Inspiration

Two vintage-inspired references establish the details the client is drawn to, without requiring either reference to be copied exactly.

Design direction for a custom Art Deco oval engagement ring by Sphere Diamond
02Design Direction

Design Direction

Art Deco geometry, tapered accents, milgrain and the idea of a discreet hidden birthstone are translated into one coherent design language.

CAD development for a custom Art Deco oval engagement ring by Sphere Diamond Bangkok
03CAD Development

CAD Development

The surrounding details are scaled around the actual 3 carat oval center stone so the vintage character does not visually overpower the diamond.

Finished custom Art Deco oval engagement ring by Sphere Diamond Bangkok
04Finished Ring

Finished Ring

The final platinum ring combines crisp geometry with fine vintage detailing and a personal element hidden away from the main face-up view.

Design takeaway

Reference images work best as a design vocabulary. A bespoke ring can borrow the proportions, textures or architectural details a client loves while being redrawn around the selected diamond.

Case Study 04 · Marquise

4 Carat Marquise Floral Tulip Split Shank Style in Yellow Gold

The Brief: Create a distinctive 4 carat marquise engagement ring with an elongated silhouette, sculptural floral-tulip setting and flowing split-shank profile in yellow gold.

Design Approach: The marquise diamond remains the visual focus while petal-inspired tulip forms shape the gallery beneath the stone. The yellow-gold split shank opens toward the center setting, creating a graceful transition from band to diamond and reinforcing the floral character from the side profile.

Center4.00 ct Marquise
SettingFloral Tulip · Split Shank
MetalYellow Gold
Inspiration for a 4 carat marquise floral tulip split shank engagement ring in yellow gold by Sphere Diamond Bangkok
01Inspiration

Inspiration

The design begins with a 4 carat marquise center diamond and a nature-inspired direction, combining an elongated silhouette with soft floral forms and a flowing split-shank profile.

CAD development for a 4 carat marquise floral tulip split shank engagement ring in yellow gold
02CAD Development

CAD Development

The CAD stage refines the relationship between the marquise proportions, petal-inspired tulip gallery and split shank so the structure flows naturally toward the center stone before production.

Finished 4 carat marquise floral tulip split shank engagement ring in yellow gold by Sphere Diamond Bangkok
03Finished Ring

Finished Ring

The finished yellow-gold ring brings the floral tulip setting and split shank together around the elongated marquise diamond, creating an organic profile with a strong center-stone presence.

SETTING STYLE

Choose a Setting That Fits Your Style and Lifestyle

Solitaire

Clean, timeless and focused on the center diamond.

Cathedral

Raised shoulders create an elegant transition toward the center setting.

Hidden Halo

Adds sparkle beneath the center stone while keeping a clean top view.

Halo

Surrounds the center stone with smaller diamonds for added presence.

Three Stone

A symbolic composition with a center diamond and two side stones.

Bezel

A modern setting with metal surrounding much or all of the diamond edge.

Pavé

Adds brilliance with small diamonds set along the band.

East-West

Sets an elongated diamond horizontally for a distinctive profile.

PRECIOUS METALS

Choose the Metal That Fits Your Ring

18K White Gold

Bright, refined and versatile with colorless diamonds.

18K Yellow Gold

Warm and timeless, creating a beautiful contrast with a bright diamond.

18K Rose Gold

A soft, warm blush tone with a romantic character.

Platinum

Naturally white, dense and substantial in feel.

Explore the Material Guide

TIMELINE & BUDGET

How Long Does a Custom Engagement Ring Take?

Most Sphere Diamond custom engagement rings take approximately 7–14 days after design approval. Selected less-complex designs may be possible in approximately 3 days, subject to design, diamond and material availability and production confirmation.

ConsultationVision, budget, diamond and timeline
CADDevelop and review the design
7–14 DaysTypical production after approval
From 3 Days*Selected designs, subject to confirmation

How Much Does a Custom Engagement Ring Cost?

There is no single fixed price for a custom engagement ring because every project can be different. Price is influenced by the center diamond, color and clarity, precious metal, metal weight, side stones, engraving and design complexity.

Custom does not mean choosing the most expensive option in every category. Our team can help balance diamond size, quality, material and construction around the budget you prefer.

Request a Custom Ring Estimate

*Express timing is subject to design complexity, diamond/material availability and production confirmation.

WHY SPHERE DIAMOND

Why Create Your Custom Ring With Sphere Diamond?

Compare Before You Decide

Where available, compare diamond shapes and sizes in person rather than relying only on photographs.

Lab Grown Diamond Specialists

Specialist guidance focused on lab grown diamond jewelry and practical diamond selection.

IGI Grading Reports

Qualifying center lab grown diamonds are available with independent IGI grading reports.

CAD Before Production

Review proportions and details from multiple angles before your ring enters production.

Designed Around Your Diamond

Develop the setting around the actual dimensions of the selected center diamond.

CentralWorld Bangkok

A private Bangkok consultation where you can try styles and discuss your project with our team.

CENTRALWORLD — BANGKOK

Design Your Custom Engagement Ring at CentralWorld Bangkok

Visit Sphere Diamond at CentralWorld Bangkok for a private custom-ring consultation. Compare diamonds, try engagement-ring styles and discuss setting, metal, budget and your proposal timeline directly with our team.

Sphere Diamond Boutique — CentralWorld, 1st Floor, Bangkok. Open Tuesday–Sunday, 12:00–19:00.

If you are visiting Bangkok for a limited time, tell us your departure or proposal date at the beginning so we can advise what is realistically possible.

Book a CentralWorld Consultation
Sphere Diamond boutique at CentralWorld Bangkok for custom lab grown diamond engagement rings

CUSTOM RING FAQ

CUSTOM RING EDUCATION

Planning Before You Start Your Custom Ring

If you are still researching the differences between ready-made and custom engagement rings, design possibilities, diamond choices, metals, budget considerations and production timing, read our educational guide first. When you are ready to design, return to this service page to begin your custom engagement ring consultation in Bangkok.

Read the Custom Engagement Ring Guide

Frequently Asked Questions About Custom Engagement Rings

Where can I make a custom engagement ring in Bangkok?

Sphere Diamond offers custom lab grown diamond engagement ring design at CentralWorld Bangkok. Clients can choose the center diamond, setting, precious metal and personalized details and review a 3D CAD design before production.

Can I send you a photo of a ring I like?

Yes. Inspiration images are a useful starting point. Our team can identify the elements you like and adapt the concept around your selected diamond, proportions and preferences rather than simply relying on a generic preset design.

Can I choose my own center diamond?

Yes. Selecting the center diamond before the final design allows the setting to be developed around the stone’s actual dimensions and proportions.

Are Sphere Diamond lab grown diamonds IGI certified?

Qualifying center lab grown diamonds are available with independent IGI grading reports detailing characteristics such as carat weight, color, clarity and cut information.

Can I see the CAD before the ring is made?

Yes. CAD review is a key part of the custom process. You can review the design from multiple angles and discuss appropriate adjustments before approving it for production.

How long does a custom engagement ring take?

Standard custom-ring production is typically approximately 7–14 days after design approval. Selected less-complex designs may be possible in approximately 3 days, subject to design, diamond/material availability and production confirmation.

Can you make a custom engagement ring while I am visiting Bangkok?

Potentially, depending on the design and production schedule. Tell us your Bangkok travel dates as early as possible so we can assess the preferred design, available diamond and materials and advise what can realistically be completed during your visit.

Is a custom engagement ring more expensive?

Not necessarily. Cost depends on the center diamond, precious metal, ring weight, side diamonds and design complexity. A custom process can help allocate the budget toward the details that matter most to you.

Can the engagement ring be designed to sit with a wedding band?

Yes. If a flush fit with a wedding band is important, tell us during the consultation so the relationship between the two rings can be considered during CAD development where technically appropriate.

Can you create a custom ring from a Pinterest or Instagram reference?

Yes. You can share inspiration images from Pinterest, Instagram or other references. We use them to understand the design elements you like, then develop a ring around your selected diamond, proportions and personal preferences rather than simply copying a preset design.

Can you make a custom engagement ring in platinum?

Yes. Platinum is available for selected custom engagement ring designs, alongside 18K white gold, yellow gold and rose gold. Our team can advise which metal best suits your preferred design, proportions and budget.

Can I order a custom engagement ring online if I am outside Thailand?

Yes. Many parts of the custom process can be handled remotely, including inspiration review, diamond selection, CAD approval and production updates. Contact our team with your location and preferred timeline so we can confirm the most suitable process and delivery options.

CONTINUE YOUR RESEARCH

Helpful Guides Before You Design Your Ring

Engagement Ring GuideDiamond GuideDiamond Shape GuideWhere to Buy Lab Grown Diamonds in Bangkok

PERSONALIZE YOUR LOVE STORY

Ready to Create Your Ring?

You do not need to arrive with a finished design. Bring us a photograph, a favorite diamond shape, an idea — or simply tell us the story behind the ring. We will help you develop it into something personal.

Start Your Custom Ring  Book a Private Consultation