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...

Hardness 6.5-7 Ca3Fe2(SiO4)3 硬度: 6.5-7 化学成分:Ca3Fe2(SiO4)3 Most people would go for a gemstone that has the least flaws or at least an...

Like Diamonds, the evaluation of Jadeite is based upon four important criteria: Colour is the top contributing aspect in a piece of jade....

Al2SiO4(F,OH)2 Hardness of 8 化学成分：Al2SiO4(F,OH)2 宝石硬度：8 Although topazes exist in a wide range of colours, when the word "Topaz" is...

Chemical Composition: BaTiSi3O9 Hardness 6-6.5 化学成分：BaTiSi3O9 硬度6-6.5 Benitoite is an extremely rare blue barium titanium cyclosilicate,...

Caratell is proud to present this extremely clean and rare of the rarest gems