http://www.facetingrough.com/gemstone_properties/properties_sphalerite.shtml WebParcel of Cutters Deal Bulgarian sphalerite 1205.36ctw mm varies free form rough. The gemstones were mined in Bulgaria. An uncommon treasure for gemstone collectors, sphalerite is a gem that has few peers in the realm of gemstones. With 3.5 times more dispersion than diamond, its fiery beauty makes it a gem in high demand with gem lovers …
Sphalerite Appraisal - International Gem Society
WebIf you swallow particles of these gems, their dissolution in your stomach could release impurities in the mineral. Certain gems may react dangerously with stomach acid to produce hydrofluoric acid (HF) or hydrogen sulfide … WebSphalerite is very soft, 3.5 to 4 on the Mohs scale. That means it will lose its luster just from normal cleaning. It's also brittle and has perfect cleavage. There is no way this gem could stand up to the abuse a ring stone receives. However, sphalerite could be used in a pendant or brooch worn only on special occasions. Donald Clark, CSM IMG newcastle united team
gem-sphalerite.com - Rough selection
WebAug 17, 2004 · Sphalerite rough isn't rare, but cut stones of this size definitely are, especially when set into well-designed jewelry. I've heard the figure of $200 per carat for sphalerites of that size/color but that could be way off. I found several stones for sale in the 5-7.5 carat range for about $100/ct. retail. WebSphalerit R1 Slice Fantastic Rarity Genuine Sphalerite Natural Stone rough gem from Spain Mina Las Manfora gem yellow honey color (185) $38.74 $45.57 (15% off) Raw Rough Sphalerite Stone, Rough Sphalerite Stones, Sphalerite Crystals, Rough Sphalerite Crystals, Sphalerite Bulgaria, (273) $6.90 WebSphalerite (zinc sulfide) Color: Green, brown, yellow, red, orange and colorless. Moh’s hardness: 3.5-4 Refractive index: 2.268-2.371 Critical angle: 25° Specific gravity: 4.08-4.1 … international workers day images