Tanzanite (Blue Zoisite) - An unheated pink zoisite would be extraordinary
Tanzanite (Blue Zoisite) Hardness: 6.5 Ca2Al3(SiO4)3(OH) 硬度: 6.5 化学成分: Ca2Al3(SiO4)3(OH) Tanzanite, a relatively new gem but has already...
Tanzanite (Blue Zoisite) - An unheated pink zoisite would be extraordinary
DIAMOND
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