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a solid RI (1
These are faceted labmade Zinc Sphalerite (ZnS)
which is over four times that of diamond
The most classic gem produced by science is laser ruby
absorbed that energy and converted it into the powerful coherent beam that lasers are known for
Sparkly Zincite Gem 6.1ct czochralski a solid RI (1This is a zincite crystal that I faceted. It weighs in at 6. 1ct. These crystals grew unintentionally in a Polish zinc refinery smokestack which was demolished in the 70s. It is also filled with sparkly zinc crystals. These unfortunately also cause unavoidable scratching in the final polish but they also add a rainbow sheen when viewed from the right angle. The stone also has some minor chipping.
