WebBlue sapphire belongs to the mineral species corundum. It can be a pure blue but ranges from greenish blue to violetish blue. The name “sapphire” can also apply to any corundum … Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide (α-Al2O3) with trace amounts of elements such as iron, titanium, chromium, vanadium, or magnesium. The name sapphire is derived via the Latin "sapphirus" from the Greek "sappheiros", which referred to lapis … See more Sapphire is one of the two gem-varieties of corundum, the other being ruby (defined as corundum in a shade of red). Although blue is the best-known sapphire color, they occur in other colors, including gray and black, and also can … See more Sapphires can be treated by several methods to enhance and improve their clarity and color. It is common practice to heat natural sapphires to improve or enhance their appearance. This is done by heating the sapphires in furnaces to temperatures … See more In 1902, the French chemist Auguste Verneuil announced a process for producing synthetic ruby crystals. In the flame-fusion (Verneuil process), fine alumina powder is added to an oxyhydrogen flame, and this is directed downward against a … See more Sapphires in colors other than blue are called "fancy" or "parti-colored" sapphires. Fancy sapphires are often found in yellow, orange, green, brown, purple and violet hues. See more Rubies are corundum with a dominant red body color. This is generally caused by traces of chromium (Cr ) substituting for the (Al ) ion in the corundum structure. The color can be modified by both iron and trapped hole color centers. Unlike localized … See more Sapphires are mined from alluvial deposits or from primary underground workings. Commercial mining locations for sapphire and ruby include (but are not limited to) the following … See more • Etymologically, the English word "sapphire" derives from French saphir, from Latin sapphirus, sappirus from Greek σαπφειρος (sappheiros) from Hebrew סַפִּיר (sapir), a term that probably originally referred to lapis lazuli, as sapphires were only discovered in … See more
Sapphire - The Gemology Project
WebNatural sapphires form deep underground when aluminum oxide crystallizes into the mineral corundum under extremely high temperatures and pressures and then gains color from … WebSapphire form in rocks that geologists call undersaturated, or rocks that have no free quartz. Spinel is another gem that forms in undersaturated rocks. Spinel may come in many of … moana underwear 2t
Sapphire Quality Factors Different Types & Colors of …
WebAnswer 1: Sapphire is the name for the mineral corundum when it is blue in color. Minerals are composed of atoms of certain elements in certain arrangements. Corundum is made … WebFeb 22, 2012 · Sapphire (a corundum variety) is an aluminum oxide occurring in every color of the rainbow. It is a stone of great hardness and durability. It can also have phenomenal characteristics like asterism (star sapphire) and color changing (like alexandrite). WebSapphire is a variety of Corundum, an aluminum oxide mineral that forms in prismatic tabular, bipyramidal or rhombohedral crystals, as well as granular or massive habits, and … moana\u0027s grandmother