Ruby$11,800+1.4%Sapphire$86,000-0.4%Sapphire$11,500+1.8%Emerald$34,000+1.3%Emerald$13,200+2.6%Paraíba Tourmaline$42,000+4.7%Paraíba Tourmaline$13,000+3.1%Spinel$6,200+0.6%Cobalt Spinel$21,000+5.2%
WORLDWIDE LAUNCHFebruary 2027
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Home / Market Guide / ALEXANDRITE

Alexandrite

ALEXANDRITE

Green by day, red by night

Alexandrite is a chrysoberyl that changes colour: green to bluish green in daylight, red to purplish red under warm light. Chromium causes it, and the strength of that change decides the price.

It was found in the Ural Mountains in the 1830s and named after the future Tsar Alexander II. Brazil, Sri Lanka, India and East Africa produce today, but a strong, clean change in a stone above two carats remains one of the rarest things in the trade.

SOURCE
Russia, Brazil
Also Sri Lanka, India and East Africa.
VALUE DRIVER
Strength of change
A weak change is worth a fraction of a complete one.
TREATMENT
Rarely treated
Untreated is usual; the change is natural.
VAULT TRADE STANDARD

Only the finest alexandrite: strong, complete colour change, eye-clean, from 1 ct, untreated, with a top-four laboratory report.

NOT YET LISTEDAlexandrite lists on CGEMX when real stones arrive, with real prices.