Reference stone from the laboratory archive. This page is for species recognition; it is not a numbered GRA report.
The ancient Egyptians mined peridot on the Red Sea island of Zabargad. The stone is gem olivine — typically yellowish green to olive green — and remains a staple in colored-stone jewelry.
On the bench, peridot is separated from look-alike green materials by optical and physical constants. Inclusions and surface features help confirm the story the instruments begin.
Browse this archive for species notes. Check any printed GRA number on the Certificate page.
EMERALD
FANCY COLOR DIAMOND
DIAMOND
AQUAMARINE