---
title: "Laboratory-Grown Diamond Report: meaning in gemology"
description: "The Laboratory-Grown Diamond Report was GIA's digital-only report for laboratory-grown diamonds, from October 2020 to September 2025. It gave color and…"
url: https://digitalgemology.com/learn/glossary/laboratory-grown-diamond-report
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[Glossary](https://digitalgemology.com/learn/glossary) · Grading report

# Laboratory-Grown Diamond Report

Also called GIA Laboratory-Grown Diamond Report, lab-grown diamond report, synthetic diamond grading report, LGDR

The Laboratory-Grown Diamond Report was GIA's digital-only report for laboratory-grown diamonds, from October 2020 to September 2025. It gave color and clarity grades and stated the growth method, CVD or HPHT.

## In more detail

GIA designed it to look distinctly different from its reports for natural diamonds. GIA inscribed each stone with the report number and the word LABORATORY-GROWN. Since 1 October 2025, GIA issues a Laboratory-Grown Diamond Quality Assessment instead. It calls a stone Premium or Standard and gives no D-to-Z or clarity grades.

## On a grading report

The report type itself states the origin. IGI marks lab-grown stones with "LG" before the report number, and Comments can note the growth method on request.

## Related terms

- [Laboratory-grown diamond](https://digitalgemology.com/learn/glossary/laboratory-grown-diamond): A laboratory-grown diamond is a diamond that people grow with machines, by HPHT or CVD. It has essentially the same composition, crystal structure and properties as a natural diamond.
- [Natural diamond](https://digitalgemology.com/learn/glossary/natural-diamond): A natural diamond is a diamond that formed in the earth, about 160 km deep, under enormous heat and pressure. An eruption carried it to the surface.
- [Inscription](https://digitalgemology.com/learn/glossary/inscription): An inscription is text that a laser writes on the girdle of a stone, too small to see without magnification. Most often it is the report number.
- [HPHT](https://digitalgemology.com/learn/glossary/hpht): HPHT stands for high pressure, high temperature. The same conditions can grow a diamond in a laboratory or treat a natural one to change its color.
- [CVD](https://digitalgemology.com/learn/glossary/cvd): CVD, chemical vapor deposition, is one of the two usual methods for growing diamond in a laboratory. The other is HPHT.
- [Diamond grading report](https://digitalgemology.com/learn/glossary/diamond-grading-report): A diamond grading report is an independent lab's record of what a stone is and how it grades. It is true for the day the lab examined the stone.
- [Laboratory-Grown Diamond Quality Assessment](https://digitalgemology.com/learn/glossary/laboratory-grown-diamond-quality-assessment): GIA's Laboratory-Grown Diamond Quality Assessment rates a lab-grown diamond Premium or Standard. It replaced GIA's D-to-Z lab-grown reports on 1 October 2025.

## Learn more

- [What a diamond grading report is, and what it isn't](https://digitalgemology.com/learn/grading-reports/what-is-a-diamond-grading-report)
- [Comments, treatments and lab-grown origin on a diamond report](https://digitalgemology.com/learn/grading-reports/diamond-report-comments-treatments-origin)
- [Moissanite certificates vs diamond grading reports](https://digitalgemology.com/learn/diamond-vs-moissanite/moissanite-certificate-vs-diamond-report)

[All 328 terms](https://digitalgemology.com/learn/glossary)