Wholesale Round Natural Diamonds

Why Round Brilliants Remain the Core of the Trade

The round brilliant is the most requested diamond shape in fine jewelry. Its 57 or 58 facets are arranged to return light efficiently, which is why the round is the standard choice for solitaires, halo settings, tennis bracelets, stud earrings and most production lines. For a jewelry business, reliable access to well-cut rounds in consistent qualities is often the foundation of the entire inventory.

Kether Diamonds sources natural round diamonds according to a defined professional brief, whether you need a single center stone for a bespoke commission or repeated quantities for production.

What to Include in Your Brief

A precise specification allows us to focus on relevant stones immediately. For round diamonds, please include:

• Carat weight or range, for example 0.90–1.10 ct
• Color range, for example F–H
• Clarity range, for example VS1–SI1
• Cut grade requirement, for example Excellent or Very Good and above
• Polish and symmetry preferences
• Fluorescence tolerance
• Diameter range in millimetres if the setting is fixed
• Quantity, and whether stones must be matched
• Budget, destination and required date

Understanding Measurements

For round diamonds, the diameter is often as important as the carat weight. Two stones of the same weight can face up differently depending on their proportions. When a setting has already been produced, we recommend specifying the minimum and maximum diameter, the total depth percentage range and the table percentage range. This avoids stones that meet the weight requirement but do not fit the mounting or look smaller than expected.

GIA assigns a cut grade to standard round brilliants, which considers proportions, polish and symmetry. For production work, specifying a minimum cut grade is one of the simplest ways to protect consistency across a larger order.

Individual Stones and Parcels

Individual round diamonds are presented with their full grading information so each stone can be reviewed on its own merits. For production requirements, rounds can be sourced as parcels within a defined range of sizes and qualities. Parcel requirements should state the size range per stone, the total quantity or total carat weight, and the acceptable quality spread.

GIA Grading Reports

Every diamond sold by Kether Diamonds is accompanied by a GIA grading report. The report records GIA’s grading observations for the submitted stone, including carat weight, color, clarity and, for round brilliants, cut grade, together with measurements, polish, symmetry and fluorescence. Buyers can verify the report details through GIA’s official Report Check service before approving a purchase.

Who We Work With

Kether Diamonds works with jewelry retailers, independent jewelers, manufacturers, designers and professional diamond buyers. Our team operates from the Ramat Gan Diamond Exchange, with representation in Antwerp, Dubai and New York, and coordinates each request through one point of contact from the initial brief to delivery.

Frequently Asked Questions

What sizes of round diamonds can you source?
Natural round diamonds from 0.30 to 10+ carats, as individual stones or as parcels within a defined size range.

Can you match rounds to an existing setting?
Yes. Include the minimum and maximum diameter in millimetres, and we will source stones that fit the mounting as well as the quality range.

Do round diamonds come with a GIA report?
Yes. Every diamond sold by Kether Diamonds is accompanied by a GIA grading report, which includes a cut grade for standard round brilliants.

Is there a minimum order?
Requests are reviewed individually. A single center stone and a multi-stone production order can both be submitted through the same trade access form.

Response Time and Delivery

A complete sourcing request can receive an initial response within 24 hours. The more precise the brief, the faster relevant options can be identified and presented. Approved orders can be delivered through insured worldwide shipping, subject to destination, carrier and transaction requirements.

Related: Natural Diamonds · Loose Diamonds · Diamond Sourcing · Our Sourcing Process · Trust and Documentation