Alexandrite

Alexandrite properties at a glance

Geology & background

Forms in pegmatites and metamorphic rocks where beryllium, aluminum, and chromium are present.

Discovered on the future Tsar Alexander II's birthday, it became Russia's national stone.

How to identify Alexandrite

• Check whether the specimen's color and texture match typical Alexandrite examples.
• Photograph a fresh surface in natural light and avoid shadows, glare, or wet surfaces.
• Use hardness, streak, luster, grain size, and locality together; no single trait is enough for every specimen.

Where Alexandrite is found

Alexandrite is reported from multiple localities or geological settings. Exact locality should be verified from specimen provenance, maps, or field notes.

How much is Alexandrite worth?

Value depends on size, condition, color, crystal quality, locality, rarity, preparation, and provenance. Treat this as educational guidance, not an appraisal.

Common uses

• Jewelry
• Collector specimens

Interesting facts

• Called 'emerald by day, ruby by night'
• Discovered in Russia's Ural Mountains in 1830
• Named after Russian Tsar Alexander II

Care & safety

Treat Alexandrite as a collector specimen unless hardness, cleavage, and fracture are confirmed.

Avoid inhaling dust. Do not cut, grind, or polish unknown specimens without eye protection and a properly rated respirator.

Related rocks & minerals

Chrysoberyl Minerals Emerald Precious Stones Diamond Precious Stones Ruby Precious Stones Sapphire Precious Stones