Shattuckite Lightning Bolt Slab (The ribbon line is becoming popular in Turquoise jewelry.) From Mariposa County AZ Measures about 4.5" x 3.0" x .257" thick or 6.53 MM Thick weighs about 6.3 Oz. Photographed wet and slab at an angle to stop some glare so slab in pictures look smaller. I see some potential cracks so you might want to back with JB Weld.
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