Carat is a unit of weight used for diamonds. One carat equals 200 milligrams.

No. Carat measures weight, while visible size depends on dimensions, shape, proportions and cut.

One carat weighs 0.20 grams or 200 milligrams.

No. Weight doubles, but face-up diameter or area does not double in the same way.

They may have different depth, spread, proportions or shapes.

Face-up size is the visible length and width of a diamond when viewed from the top.

Spread describes how large a diamond appears face-up relative to its weight.

Yes, but excessive shallowness may reduce light performance, so size should not be optimized alone.

Yes. More weight can be hidden in depth, reducing face-up spread.

Popular milestones such as 1.00, 1.50, 2.00 and 3.00 ct often attract higher demand and price premiums.

Sometimes. A well-proportioned 0.90–0.99 ct diamond can have dimensions close to some 1.00 ct stones.

Yes, depending on shape and dimensions. Compare millimeter measurements, not carat alone.

There is no universal best size. Finger size, setting, shape, lifestyle and budget all matter.

Lab grown diamonds can make larger center stones accessible, but the right size is still a design and budget decision.

Yes. The same diamond can appear larger on a smaller finger and more proportionate on a larger finger.

Yes. A halo increases the overall visual footprint without increasing center-stone carat.

Often yes, because the contrast can emphasize the center stone.

Elongated shapes such as oval, pear and marquise often provide generous face-up coverage.

An oval often looks larger in face-up area because of its elongated outline, though actual dimensions vary.

Oval often provides more visual spread; Round is prized for balanced brilliance and standardized proportions.

Emerald cuts can appear large due to their broad rectangular face, but proportions vary widely.

Marquise often has exceptional length and finger coverage for its carat weight.

Both can offer strong spread; compare actual length × width measurements.

Radiant cuts often have a more rectangular spread, while cushions vary greatly by outline and depth.

Yes. Strong proportions balance spread with light performance; poor proportions may hide weight.

Prioritize cut and attractive proportions, then choose the largest carat that fits your budget.

It can. Larger stones may reveal body color more easily.

They can, which is why clarity should be evaluated with size and shape.

VS1–VS2 is a practical starting point, adjusted for shape and inclusion location.

VS1 or better can be useful for open-faceted shapes, though each diamond should be inspected individually.

G–H is a common value range, while D–F suits buyers seeking a more colorless appearance.

Common total weights range widely; balance visual presence, comfort, matching and budget.

Choose based on desired visibility, chain length, metal and everyday comfort.

Total carat weight is the combined weight of multiple diamonds in one piece, not necessarily the weight of a single stone.

No. 1.00 ctw may be divided among multiple diamonds.

It is usually stated as total carat weight across all diamonds in the bracelet.

Yes. Carat is the same unit of weight for both.

Yes, when they meet the definition of laboratory-grown diamond; origin does not change the carat unit.

Yes. Length, width and depth provide important context that carat weight alone cannot.

Yes. Halo, bezel, prong style, band width and side stones can change visual scale.

Diamonds around 0.90–0.99 ct may offer value if their dimensions and quality are attractive.

Diamonds around 1.80–1.99 ct can be worth comparing with 2.00 ct stones.

Not necessarily. A balanced diamond with strong cut, attractive dimensions and suitable color and clarity often looks better.

Sphere Diamond at CentralWorld Bangkok can help you compare lab grown diamond sizes, shapes and settings in person.

Sphere Diamond offers IGI-certified lab grown diamonds for qualifying stones and selected designs; confirm the report for your chosen diamond.