Origin Lab DiamondsZhejiang, China

lab grown diamond carat and millimeter size guide

Carat and Millimeter Size Guide for Lab-Grown Diamonds

Clarify carat ranges for selected stones and millimeter ranges for melee parcels before opening a wholesale quote.

Specification table

Details to clarify before quoting

Use this table as a starting point for a target list. Final availability depends on current inventory, certificate route, and order structure.

Loose stone range
Common selected stone RFQs use carat ranges such as 0.30-1.00 ct, 1.00-2.00 ct, or 2 ct+
Melee range
Melee parcel RFQs usually use millimeter size and sieve range, commonly around 0.80-3.50 mm
Quote detail
Send target size plus acceptable tolerance, total volume, and whether substitutions are allowed

Buying notes

  • Carat and millimeter requests should not be mixed without context.
  • Production buyers should state tolerance and repeat-order needs.
  • Bulk buyers should specify total carat weight and size band distribution.

How to use this in an RFQ

Add these specification details to your product interest, monthly volume, destination market, certificate preference, target price, and delivery timing. A complete target list helps the sales desk return realistic options faster.

Send quote-ready specs

RFQ support

Send this specification with your target list.

We can use these details to check current availability, certificate options, QC evidence, and export documentation support.

Prefer WhatsApp?

Send a target list with product type, shape, size, grade, certificate preference, volume, destination, and target price. It is the fastest way to clarify a wholesale quote.

Open WhatsApp RFQ