Amethyst is a variety of the colorless mineral quartz whose chemical formula is SiO2 (silicon dioxide). Its purple hue comes from minuscule amounts of impurities. It is a 7 on the hardness scale.
Alexandrite is a variety of the mineral chrysoberyl whose chemical formula is BeAl2O4 (an oxide of beryllium and aluminum). It is considered a green to yellowish green mineral in natural daylight, but its color appears dark pink to purple/cherry in artificial incandescent light. This property comes from minuscule impurities of Cr(III) (chromium in the +3 oxidation state) that reflect the excess green wavelengths found in the spectrum of natural sunlight and reflect the excess red found in the spectrum of incandescent light. Ordinary chrysoberyl does not demonstrate this so-called alexandrite effect. It is an 8.5 on the hardness scale.
The two mineral species also occupy different crystal systems, broadly defined by the symmetry of their atomic arrangements. Quartz, and thus amethyst, belongs to the trigonal system, and chrysoberyl, and thus alexandrite, belongs to the orthorhombic system.
Quartz is one of the most common minerals on earth (think of sand), though amethyst is far more rare, and chrysoberyl is also a relative rarity. Natural alexandrite on the other hand, comes from less than a couple of dozen localities in the world, and this scarcity drives its high price. Artificial or synthetic alexandrites are marketed commonly because of the high price of the natural ones. The only similarities shared by amethyst and alexandrite are that they are birthstones and that they are valuable because they are durable, scarce, and attractive.
June has two (2) birthstones. The birthstones for the month of June are Pearl and Alexandrite. Alexandrite is a lovely green in both daylight and fluorescent light; it changes color to a purplish red in incandescent light.
Born in July, her birthstone is the pearl, or the moonstone (polished feldspar), or alexandrite (chrysoberyl).
Real Alexandrite is a naturally occurring gemstone with a color-changing property from green to red, while created Alexandrite is a synthetic version made in a lab using similar chemical components to imitate the color-changing effect. Real Alexandrite is rarer and more valuable than created Alexandrite.
An alexandrite can scratch tin. talc, Asbestos, Biotite, Galena/Lead, Graphite, Gypsum, Halite/Salt, Lepidolite, Muscovite, Sulfur, Zinc, Calcite, Chalcopyrite, Copper, Gold, Silver, Nickel, Platinum, Sphalerite, Titanium, Turquoise , Hematite, Magnetite, Opal, Pyrite, Uraninite, Amethyst, Aquamarine, Garnet, Olivine/Peridot, and Quartz.X- Aim D.
Alexandrite is one of the birthstones for the month of June.
a garnet is rarer. one of the rarest garnet is the alexandrite.
Alexandrite is a gemstone. It begins with the letter a.
Alexandrite, though this also comes in a variety of colours other than red.
June has two (2) birthstones. The birthstones for the month of June are Pearl and Alexandrite. Alexandrite is a lovely green in both daylight and fluorescent light; it changes color to a purplish red in incandescent light.
Born in July, her birthstone is the pearl, or the moonstone (polished feldspar), or alexandrite (chrysoberyl).
Real Alexandrite is a naturally occurring gemstone with a color-changing property from green to red, while created Alexandrite is a synthetic version made in a lab using similar chemical components to imitate the color-changing effect. Real Alexandrite is rarer and more valuable than created Alexandrite.
The Hindi name for alexandrite is अलेक्सांड्राइट (aleksaandrāit).
What does alexandrite look like?
The streak of alexandrite is usually white.
One of the places that alexandrite is mined is in Sri Lanka.
One of the places that alexandrite is mined is in Sri Lanka.
An alexandrite can scratch tin. talc, Asbestos, Biotite, Galena/Lead, Graphite, Gypsum, Halite/Salt, Lepidolite, Muscovite, Sulfur, Zinc, Calcite, Chalcopyrite, Copper, Gold, Silver, Nickel, Platinum, Sphalerite, Titanium, Turquoise , Hematite, Magnetite, Opal, Pyrite, Uraninite, Amethyst, Aquamarine, Garnet, Olivine/Peridot, and Quartz.X- Aim D.