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...
top of page
Caratell
May 6, 20203 min read
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...
415 views0 comments
Caratell
Apr 24, 20202 min read
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....
4,985 views0 comments
Caratell
Apr 24, 20203 min read
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...
457 views0 comments
Caratell
Apr 24, 20202 min read
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,...
295 views0 comments
Caratell
Apr 23, 20202 min read
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
512 views0 comments
bottom of page