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Goshenite
Gemstone
Goshenite is a colorless gem variety of beryl. It is called the mother of all gemstones because it can be transformed into other like emerald, morganite, or bixbite. Goshenite is also referred to as the purest form of beryl since there are... Wikipedia
Hardness (Mohs hardness scale): 7.5 – 8
Refractive index: 1.57 – 1.58
Chemical formula: Be₃Al₂SiO₆