Caratell Mar 1 2 min 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...
Caratell May 6, 2020 3 min Demantoid Garnet – A highly esteemed garnet with adamantine lustre and amazing ‘horsetail’ inclusion 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...
Caratell Apr 24, 2020 2 min The Truth about Imperial Jadeite Like Diamonds, the evaluation of Jadeite is based upon four important criteria: Colour is the top contributing aspect in a piece of jade....
Caratell Apr 24, 2020 3 min Imperial Topaz - The most highly prized in the Topaz family 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...
Caratell Apr 24, 2020 2 min Benitoite - Top 10 Rarest Gems 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 Apr 23, 2020 2 min Bixbite - Red Beryl trade call Red Emerald, one of ten rarest gemstones on Earth Caratell is proud to present this extremely clean and rare of the rarest gems
