Lapidary Journal - November, 1966. Arco-Iris Opal de Mexico; Isle of Jewels (Ceylon); Coober Pedy Opal; Giant Selenite Clusters; Crystal Peak, Colorado; Swirled Scroll Ring; Rare Faceting Minerals
Leiper, Hugh (Editor and Managing Editor)
From Singularity Rare & Fine, Baldwinsville, NY, U.S.A.
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