Min 1.50ct Mm Varies Round Cabochon Cats Eye Alexandrite. Moderate-Strong Color Change. Item: A2R153
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Product Description for Min 1.50ct Mm Varies Round Cabochon Cats Eye Alexandrite. Moderate-Strong Color Change.-A2R153Alexandrite is a phenomenal gem known as "emerald by day, ruby by night" because it changes color from green in fluorescent and daylight to red in incandescent light. Ranking 8.5 on Mohs' scale, it's ideal for daily wear. Discovered in 1830 in emerald mines of Russia's Ural Mountains, it was named for Czar Alexander II. Found in Brazil, Sri Lanka, and Tanzania, alexandrite only forms when aluminum/beryllium and chrome (which rarely occurs in nature) come together, accounting for its rarity.
Product Information for Min 1.50ct Mm Varies Round Cabochon Cats Eye Alexandrite. Moderate-Strong Color Change.-A2R153
| Product Type: | Single Stone |
Primary Stone / Alexandrite
| Shape: | Round | Count: | 1.00 |
| Cut: | Cabochon | Composition: | Natural |
| Color: | Green | Treatment: | Untreated |
| Dimensions: | Not Calibrated | Gemstone Group: | Chrysoberyl |
Care and Handling of Min 1.50ct Mm Varies Round Cabochon Cats Eye Alexandrite. Moderate-Strong Color Change.-A2R153 |
| Learn more about proper care of your gemstones and jewelry by visiting our Gemstone Enhancements and Treatments page. |
 home learning library alexandrite
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Fast Facts
| A member of the Chrysoberyl family, alexandrite holds a prized and highly priced position among jewelry and gem collectors. |
| A color change stone, alexandrite can appear green in daylight and change to a raspberry color in incandescent light, but other color changes are also highly prized. |
| Alexandrite was discovered in 1830 in the Ural Mountains on the day Czar Alexander II came of age, and thus the stones were named in his honor. |
 The primary sources for alexandrite are Sri Lanka, Brazil, Burma (Myanmar), Madagascar and Russia.
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Alexandrite is a highly prized variety of chrysoberyl. Alexandrite only forms when aluminum/beryllium and chrome (which rarely occurs in nature) come together, accounting for its rarity. On Mohs’ scale of hardness, alexandrite is 8.5. It has a strong vitreous luster and primary sources include Sri Lanka, Zimbabwe, and Brazil (Minas Gerais).
Color
Alexandrite is typically found in blue, blue-green, and brownish-green shades. However, this phenomenal gem is known as "emerald by day, ruby by night" because of its ability to change color, depending on the type of light in which it's viewed. In the daylight and fluorescent light, alexandrite appears in shades of blue and green, but in tungsten (incandescent) light, it appears in shades of red. Other alexandrite color changes are possible (from blue to purple, from greenish blue to reddish blue, from brownish-green to brownish-red, etc.) and also highly prized.
   
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