Archive · 5 Jun 2025
GIA Changes Lab-Grown Diamond Grading
The GIA, a group that grades diamonds, is changing how it rates lab-grown diamonds.
Instead of using the 4Cs like cut, color, clarity, and carat weight, they'll now call them 'premium' or 'standard'.
This is because lab-grown diamonds are made in labs, not the earth, and are different from natural ones.
This change will make it clearer for people buying diamonds.
Some people think it's good because it's more honest, while others believe it won't change anything.
The goal is to help customers understand the difference between lab-made and natural diamonds.
GIA will no longer grade lab-grown diamonds using the 4Cs system.
Lab-grown diamonds will be classified as 'premium' or 'standard'.
This change aims to differentiate lab-grown diamonds from natural diamonds.
Industry experts see this as a positive move towards transparency.
The shift acknowledges differences in formation and value between natural and lab-grown diamonds.
- Who
- Gemological Institute of America (GIA)
- What
- GIA will stop using the 4Cs grading system for lab-grown diamonds and instead use 'premium' or 'standard' descriptors.
- When
- Starting later this year
- Where
- Global gem trade
- Why
- To differentiate lab-grown diamonds from natural diamonds and clarify their evaluation.
Lab-Grown Diamond Manufacturers
Natural Diamond Supporters
Grading Agencies
Lab-Grown Diamond Manufacturers
Multiple agencies grade lab-grown diamonds.
Natural Diamond Supporters
GIA's decision reaffirms the emotional and geological uniqueness of natural diamonds.
Long-Term Value
Lab-Grown Diamond Manufacturers
Debates persist about the long-term value of lab-grown diamonds.
Natural Diamond Supporters
Natural diamonds have formed over billions of years, creating a significant difference in value.
- Original 4Cs
- Cut, Color, Clarity, Carat weight
- New Descriptors
- Premium or Standard
- Organization
- Gemological Institute of America
- Affected Stones
- Lab-grown diamonds