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$400.00 USD
价格
362
5

Gem Quality Garnet 3.95Ct Top Color Natural Fanta Spessartite

存货单位
27H
尺寸(毫米)
8.450 x 8.500 x 5.950mm
重量 (cts)
3.950
Treatment
No Treatment
Shape
Cushion
类型
Faceted
Clarity
VVS
颜色

Garnet is the name used for a large group of rock-forming minerals. These minerals share a common crystal structure and a generalized chemical composition of X3Y2(SiO4)3. In that composition, "X" can be Ca, Mg, Fe2+ or Mn2+, and "Y" can be Al, Fe3+, Mn3+, V3+ or Cr3+.

These minerals are found throughout the world in metamorphic, igneous, and sedimentary rocks. Most garnet found near Earth's surface forms when a sedimentary rock with a high aluminum content, such as shale, is subjected to heat and pressure intense enough to produce schist or gneiss. Garnet is also found in the rocks of contact metamorphism, subsurface magma chambers, lava flows, deep-source volcanic eruptions, and the soils and sediments formed when garnet-bearing rocks are weathered and eroded.

Most people associate the word "garnet" with a red gemstone; however, they are often surprised to learn that garnet occurs in many other colors and has many other uses. In the United States, the major industrial uses of garnet in 2012 were waterjet cutting (35%), abrasive blasting media (30%), water filtration granules (20%), and abrasive powders (10%).

Item Details



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发货自:
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概述

列表类型 : Standard
产品编号 : 2510522
开始 : 20th November 2024 03:58 am PST
* 所有价格均以:货币为单位