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 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.
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.
Geographic Origin Determination of Alexandrite
Jan 31, 2020 · When an alexandrite first arrives at the GIA laboratory, we ask a question even more fundamental than geographic origin: Is this a natural alexandrite? Fourier-transform infrared spectroscopy (FTIR) is performed on every alexandrite to distinguish natural from synthetic material (Stockton and Kane, 1988) and to identify imitations.
What’s an “alexandrite sapphire”? - GIA
What’s an “alexandrite sapphire”? Generally, this refers to a laboratory-grown sapphire that has been manufactured with trace elements that give it a color-change effect similar to natural alexandrite.
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 History and Lore - GIA
Discover the meaning and history of alexandrite, a June birthstone, and where it can be found.
Alexandrite Quality Factors - GIA
Fine alexandrite is green to bluish green in daylight and red to purplish red in incandescent light. Its color saturation is moderately strong to strong. Stones that are too light do not reach the quality of color intensity seen in fine-quality gems.
Alexandrite Care and Cleaning Guide - GIA
Learn about alexandrite's durability and how to care for your alexandrite jewelry.
Pearl, Alexandrite, Moonstone Birthstones - GIA
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.