Reference stone from the laboratory archive. This page is for species recognition; it is not a numbered GRA report.
Often described by gem aficionados as emerald by day, ruby by night, alexandrite is the color-change variety of chrysoberyl. Daylight and incandescent light can shift the body color dramatically.
Because color-change stones attract imitation and misnaming, laboratory identification matters. A GRA report records species and the observed change so invoices and settings stay consistent.
Use this Featured entry for recognition. Use Certificate No. when you hold a printed GRA document for a specific alexandrite.
CITRINE
PERIDOT
EMERALD
FANCY COLOR DIAMOND