Gem Silica slab I

279 ct – 3/16″ thick

Rough sold at aprox $3.00 per ct (estimated due to host material)
Dime for scale

Gem silica from British Columbia, Canada. Found close to the main Ocean picture Stone quarry. This unbelievable seam of Gem Silica is a natural Blue-Green Chalcedony which owes it’s unique coloring not only to Copper (as is with Gem Silica), but also Cobalt and Titanium.
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Here is more information on Gem Silica: https://geology.com/gemstones/gem-silica/