Gem Silica Cutting Rough Page 4 - $1.40/gram
Gem Silica is prized for it's fine blue color and hardness. Gem silica is chalcedony (microcrystaline quartz) that is colored with copper. It is becoming very difficult to find good gem silica. This material is from the collection of a fellow who worked at the Ray Mine in the early 1960's.

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Item #: Gem Silica14F- Gem Silica - $793.77
Locality: Ray Mine, Pinal County, Arizona

Measures approximately 90.6mm long x 869.6mm wide x 46.7mm thick and weighs 566.98 grams (1.25 lb.).

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Item #: Gem Silica15F- Gem Silica - $313.14
Locality: Ray Mine, Pinal County, Arizona

Measures approximately 76.7mm long x 68.5mm at the widest point x 41.4mm at the deepest point and weighs 223.674 grams (7.89 oz).

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Item #: Gem Silica16F- Gem Silica - $231.27
Locality: Ray Mine, Pinal County, Arizona

Measures approximately 91.0mm long x 66.0mm wide x 18.0mm thick and weighs 165.19 grams (5.287 oz.).

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Item #: Gem Silica17F- Gem Silica - $133.91
Locality: Ray Mine, Pinal County, Arizona

Measures approximately 56.5mm long x 51.8mm wide x 30 to 11mm thick and weighs 95.65 grams (3.374 oz.).

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