![]() "Aquamarine Emerald" is a registered trade name that is used for a kind of triplet stone that has two layers of usually aquamarine or sometimes colorless beryl that are cemented together with a green cement to create the impression of a true emerald. The name aquamarine has been used as a modifier for many other materials such as aquamarine tourmaline, aquamarine emerald, aquamarine chrysolite, aquamarine sapphire, aquamarine topaz, etc. The liquid can expand considerably if the crystals become overheated, causing them to fracture badly, or in rare instances, to explode. Inclusions in aquamarine may include mica, hematite, liquid-filled (often salt-water) tubes and hoses. There is also a red beryl that comes from Utah. ![]() ![]() Other beryl varieties that have been used for gems include emerald (blue green to green), goshenite (colorless), morganite (pink to violet), and heliodor or golden beryl. Optically, beryl is uniaxial negative some specimens may be strongly diachronic its refractive index ranges from about 1.57-1.58 or to 1.58-1.59. Beryl crystallizes in the hexagonal system, it ranges in hardness from 7 1/2 to 8 on Moas scale it has an imperfect cleavage and a vitreous luster. Aquamarine is the mineral Beryl, a Beryllium Aluminum Silicate with the general chemical formula Be 3Al 2(Si 16O 18). Aquamarine ranges from pale blues to light blues to yellowish blues. Aquamarine has been the traditional birth stone for the month of March although some jeweler's charts list bloodstone as an alternate.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |