When.com Web Search

Search results

1. Results From The WOW.Com Content Network

2. Chrysoberyl - Wikipedia

   en.wikipedia.org/wiki/Chrysoberyl

   Hydrothermal lab-grown alexandrite has identical physical and chemical properties to real alexandrite. [ 18 ] Some gemstones falsely described as lab-grown synthetic alexandrite are actually corundum laced with trace elements (e.g., vanadium ) or color-change spinel and are not actually chrysoberyl.

3. Synthetic alexandrite - Wikipedia

   en.wikipedia.org/wiki/Synthetic_alexandrite

   Synthetic alexandrite is an artificially grown crystalline variety of chrysoberyl, composed of beryllium aluminum oxide (BeAl 2 O 4). The name is also often used erroneously to describe synthetically-grown corundum that simulates the appearance of alexandrite , but with a different mineral composition.

4. Birthstone - Wikipedia

   en.wikipedia.org/wiki/Birthstone

   In 1912, to standardize birthstones, the (American) National Association of Jewelers (now called Jewelers of America) met in Kansas and officially adopted a list. [1]: 317 The Jewelry Industry Council of America updated the list in 1952 [3]: 311 by adding Alexandrite for June, citrine for November and pink tourmaline for October.

5. Sapphire - Wikipedia

   en.wikipedia.org/wiki/Sapphire

   However, the latter term is a misnomer: synthetic color-change sapphires are, technically, not synthetic alexandrites but rather alexandrite simulants. This is because genuine alexandrite is a variety of chrysoberyl: not sapphire, but an entirely different mineral from corundum. [22]

6. List of gemstones by species - Wikipedia

   en.wikipedia.org/wiki/List_of_gemstones_by_species

   Lab alexandrite; Lab corundum; Cubic zirconia; Lab diamond; Lab emerald; Fordite; Gadolinium gallium garnet; Lab moissanite; Synthetic opal; Metal-coated crystals hyped as rainbow quartz; Lab spinel; Synthetic turquoise; Terbium gallium garnet; Trinitite; Yttrium aluminium garnet; Yttrium iron garnet

7. Amber - Wikipedia

   en.wikipedia.org/wiki/Amber

   Amber is used in jewelry and as a healing agent in folk medicine. There are five classes of amber, defined on the basis of their chemical constituents. Because it originates as a soft, sticky tree resin, amber sometimes contains animal and plant material as inclusions . [ 3 ]