The main types and main origin of garnet

The main kinds of
There are many types of purple tooth of the primary deposit, the main production in many magmatic or metamorphic rock class, most of the gem grade garnet supplier found in the alluvial placer. Purple tooth is the family of garnet mineral, is chemical complex silicate mineral silicate (island), usually with A3B2 [SiO4] 3 said. Among them A for Ca2 +, magnesium 2 +, Fe2 +, Mn2 + bivalent cation, such as Al3 + B said, Fe3 + and Cr3, + trivalent cations. Crystal is rhombic dodecahedron, four corners 38 sides, or the combination of both. Aggregate for granular or massive. Garnet color affected by the composition, present a variety of colors, including red series including red 'pink' purple 'orange; Yellow series including yellow 'orange' densely yellow brown yellow; Green series including green olive green. Crystal glass luster, the adamantine luster, fracture oily luster. Transparent to translucent. Not homogenate, pleochroism, no double refraction phenomenon. Garnet can be divided into two series, six main varieties: almandine series (pyrope, almandine and spessartine) and andradite series (uvarovite, grossular andradite).
The main producing area
garnet suppliers origin in China especially in Inner Mongolia, lianyungang, jiangsu, shandong rizhao most representative. Garnet sand hardness of Inner Mongolia, but mainly for the wind, dust content is bigger, affect the cutting speed. In addition, as small workshops to produce more, deep in the inland, transport costs are very high; Jiangsu lianyungang garnet sand has been the leading producer of domestic garnet sand, bright color, hardness, general open pit mine, for the local small workshops to produce more, so low cost low price cheap, quality control is not strict, there are often various impurities, often have the phenomenon of water knife plug. At the end of 2011, the government closed the local mines, lianyungang forbid anyone to disorderly open excessive mining, lead to domestic garnet sand supply very nervous; Shandong rizhao garnet for deep mines, color slants deep black, high hardness, since 2011 sales in the domestic market, so it is less known another origin, large output, stable quality, sea land transportation is convenient, is the leading producer of the next few years China garnet.