Reference stone from the laboratory archive. This page is for species recognition; it is not a numbered GRA report.
Diamond forms under high temperature and pressure conditions deep in the Earth. In jewelry and manufacturing, identity, cut quality factors and treatments are the points trade professionals expect on a laboratory document.
Look-alikes and laboratory-grown material make clear reporting essential. A GRA report carries a number that can be checked on this site years after the paper was printed.
This Featured page introduces the species. Verify a specific report with Certificate No. under Certificate.
AQUAMARINE
KUNZITE
ALEXANDRITE
CITRINE