Alexandrite Gemstone | Natural Alexandrite Stone - GIA
Often described by gem aficionados as “emerald by day, ruby by night,” alexandrite is the very rare color-change variety of the mineral chrysoberyl. Originally discovered in Russia’s Ural Mountains in the 1830s, it’s now found in Sri Lanka, East Africa, and Brazil, but fine material is exceptionally rare and valuable.
Alexandrite Description - GIA
Alexandrite, with its chameleon-like qualities, is a rare variety of the mineral chrysoberyl. Its color can be a lovely green in daylight or fluorescent light, changing to brownish or purplish red in the incandescent light from a lamp or candle flame.
Alexandrite Gemstone | Natural Alexandrite Stone - GIA
Alexandrite Gemstone is a rare variety of the mineral Chrysoberyl & is a strongly pleochroic gem. Color-changing alexandrite is nature’s magic trick.
Alexandrite History and Lore - GIA
Abundant alexandrite deposits were first discovered in 1830 in Russia’s Ural Mountains. Those first alexandrites were of very fine quality and displayed vivid hues and dramatic color change. The gem was named after the young Alexander II, heir apparent to the throne.
Alexandrite Gemstone | Natural Alexandrite Stone - GIA
Alexandrite is the color-change variety of the mineral chrysoberyl. Alexandrite is bluish green in daylight or fluorescent light. Alexandrite is purplish red in incandescent light or candlelight. This alexandrite specimen is made up of three interpenetrant crystals.
Alexandrite - Gemological Institute of America
Three alexandrite crystals grew through one another to create a star. Alexandrite can change colors under different kinds of light. For example, it can be green in daylight but can change to a brownish or purplish red under a lamp.
GIA Gem Encyclopedia | Complete List Of Gemstones
GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional detailed gemological information, a buyer’s guide, photos, videos & research.
Alexandrite Quality Factors - GIA
Alexandrite’s pleochroism makes it a challenge for cutters. When fashioning alexandrite, cutters orient the gem to show the strongest color change through the crown. It’s crucial to position the rough so the fashioned stone shows both purplish red and green pleochroic colors face-up.
Geographic Origin Determination of Alexandrite
2020年1月31日 · The gem and jewelry trade has come to place increasing importance on the geographic origin of alexandrite, as it can have a significant impact on value. Alexandrites from Russia and Brazil are usually more highly valued than those from other countries.
June Birthstones | Pearl, Alexandrite, Moonstone Birthstones - GIA
Alexandrite Birthstone Meaning & History. Alexandrite is the rare variety of the mineral chrysoberyl that changes color in different lighting. Most prized are those alexandrite birthstones that show a vivid green to bluish green in daylight or fluorescent light, and an intense red to purplish red in incandescent light.