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September 16, 2017
English Name: Agate
Chemical Formula: SiO2 silicon dioxide (kind of Quartz)
Crystal system: Rhombohedral Microcrystalline
Refractive index: 1.530–1.540 (Bi-refringence up to 0.004)...
March 14, 2017
In order to identify your gems or not, you have to understand the crystal structure.
What is Crystal Structure ?
In crystallography, crystal structure is a description of the ordered arrangement of atoms, ions or molecules in a crystalline material....
March 7, 2017
Gemstones or namely semi-precious stones are a product of the earth and formed by different ways:
1. like Diamond and Zircon, were formed deep in the earth over thousand or billion years and brought to the surface by explosions of molten rock.
2. like Topaz, Tourmaline...
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