Alexandrite
A variety of Chrysoberyl
What is Alexandrite?
Alexandrite is a rare variety of chrysoberyl discovered in Russia's Ural Mountains in the 1830s and named after Tsar Alexander II. This extraordinary gemstone exhibits a dramatic color change, appearing green in daylight but shifting to red or purplish-red under incandescent light - a phenomenon caused by chromium in its crystal structure. With a hardness of 8.5 on the Mohs scale, alexandrite is both durable and exceptionally valuable, with fine specimens often commanding prices higher than diamonds due to their extreme rarity and mesmerizing optical properties.
Uses & Applications
Alexandrite is one of the most valuable gemstones, prized for its dramatic color change. Used exclusively in high-end jewelry including rings, pendants, and earrings. Synthetic alexandrite is used in lasers.
Healing Properties
Believed to balance physical and emotional well-being, enhance self-esteem, and bring joy. Thought to aid in decision-making and help overcome fear. Associated with regeneration and renewal.
Optical Properties
- Refractive Index
- 1.746-1.755
- Pleochroism
- Strong
- Optical Character
- Uniaxial negative
- Dispersion
- 0.015
Discover Values
This stone excels in rarity, popularity, beauty, collection value.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Alexandrite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Alexandrite Localities Map
See where Alexandrite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
The Meaning
Discovered in 1830 in Russia and named after Czar Alexander II. Considered a stone of good fortune and intellect. Believed to strengthen intuition and aid in creative endeavors. Modern birthstone for June.
Geochemistry
Forms in metamorphic rocks rich in beryllium and chromium under specific conditions. The presence of chromium creates the color-changing properties.
Associated Chakras
Quick Facts
Physical Properties
- Color
- Green, red, yellow, orange, purple (color-changing)
- Hardness (Mohs)
- 8.5
- Density
- 3.7-3.8 g/cm³
- Streak
- White
- Luster
- Vitreous
- Crystal System
- Orthorhombic
Chemical Properties
- Chemical Formula
- BeAl2O4
- Elements
- Be, Al, O
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Alexandrite FAQs
How do I identify Alexandrite?
Alexandrite can be identified by its hardness of 8.5 on the Mohs scale, Green color, Vitreous luster, Orthorhombic crystal system. Look for these key characteristics when examining specimens.
What color is Alexandrite?
Alexandrite typically appears in Green, red, yellow, orange, purple (color-changing). Color can vary depending on impurities and formation conditions.
How hard is Alexandrite?
Alexandrite has a hardness of 8.5 on the Mohs scale. This makes it a relatively hard mineral suitable for jewelry.