Straight answers for sourcing teams
Written for the person writing the specification, not for the person buying the ring.
Guides for buyers

Lab-Grown vs Natural Diamonds — A Buyer’s View
Margin, certification and assortment logic for retail programs.

How to Verify IGI & GIA Certificates
Check any stone we ship against the issuing lab’s own database.

The 4Cs, for Purchasing Teams
Speak grading fluently when you write specifications.

Metal Guide for Jewelry Programs
9K to platinum — what each choice does to cost, durability and market fit.

Jewelry Manufacturing Glossary for Buyers
The terms that appear in quotes, tech packs and QC reports.
Written for the person writing the specification
Most jewellery education online is written for the person buying a ring. These are written for the person buying a thousand of them — a product developer, a category manager, a sourcing lead who has to defend a supplier choice internally and write a specification that prices correctly the first time.
Each guide gives the practical answer in the opening paragraph and then explains what sits behind it. Where the honest answer is "it depends on your market", we say that instead of pretending there is a universal rule.
If a question your team keeps asking is not covered here, send it to us — the guides that get written next are the ones buyers actually ask for.