Direct to our Surat team

Quick enquiry

WhatsApp

The shape library

The shape of a decision.

Explore eleven diamond shapes, then compare millimetre dimensions and approximate carat weights in each shape’s size chart.

Round brilliant illustrative diamond model

Brilliant cut

Round brilliant

Balanced. Luminous. Versatile.

A circular outline and a radial facet arrangement create an even play of light. The round brilliant is a familiar starting point for solitaire settings and matched layouts.

View round brilliant size chart A closer look at round brilliant

Illustrative faceted models, shown under consistent lighting. Actual stones, facet patterns and proportions vary.

A sense of scale

Round brilliant
size chart.

All sizes, in two parts. Select any weight below to compare its approximate millimetre size.

0.02 ct reference≈ 1.7 mmDiameter · published reference

Measured across the circular outline, viewed from above.

Understand carat and the 4Cs

01 Small stones

0.02–0.20 ct

Round brilliant diamond size · small stones
Carat weight (ct)Diameter (mm, approx.)
1.7
2
2.2
2.4
2.5
2.7
2.75
2.8
3
3.2
3.4
3.7
3.8

02 Larger stones

0.25–5.00 ct

Round brilliant diamond size · larger stones
Carat weight (ct)Diameter (mm, approx.)
4.1
5.2
5.8
6.5
7.4
8.2
9.4
10.4
11.2

† Calculated estimate from nearby published sizes. Below the smallest reference, dimensions are scaled assuming unchanged proportions. These entries describe an illustrative size, not a measured stone.

Educational estimates. Carat measures weight: 1 ct = 0.2 g. Depth, girdle and proportions affect dimensions, so there is no exact mm-to-carat conversion. Check the individual stone’s measurements and grading report.

References: Diamond Source of Virginia size chart · Palloys small-diamond chart (PDF, p. 140)GIA carat education

Build a useful brief

More than
a carat weight.

Shape, millimetre dimensions, colour, clarity and matching requirements help define what you need. For individually reported stones, specify your preferred laboratory and documentation.

Availability and commercial terms are confirmed directly. Our enquiry form prepares a message to send by WhatsApp or email; it does not display live inventory or reserve stock.

Prepare a specification

Request availability

Begin with
a simple brief.

Add the specifications you know, or describe the requirement in your own words. Availability and documentation are confirmed directly by our team.

A personal reply, from our Surat team

Start with your name and country. We can help you choose the rest.

Add specifications Optional

This prepares a message on your device. Choose WhatsApp or email below, then press Send there to contact us.

Start a conversation

A specification.
A possibility.