| 8ghswr ((CHALCANTHITE)), $5 MINIMUM BID, Socorro County, New Mexico, 2 x 2 x 1 cm, Thumbnail, | |
 | Blue Copper sulfate crystals. Although these desiccate and turn whitish blue, this one is out of an old collection and so appears stable. Do keep it away from heat from hot lights or direct sunlight. Louellen Montgomery thumbnail collection. |
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