| 29777: Gypsum variety Satin Spar - $10 Niagara Falls Quarry, Niagara, Niagara County, New York Small cabinet - 8.4 x 0.8 x 0.4 cm 4.7 grams Ex Lincoln Sherk Specimen status: Available Send an email with specimen number to order A nicely translucent gypsum crystal
shard, having a silky texture (an excellent example of the
satin spar variety). Ex Lincoln Sherk; previous dealer label
(with a $20 price) indicates a collection data of March
31, 1931. Accompanied by Sherk's distinctive, handwritten
label.
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