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J763 - Dioptase $ AT-AUCTION Mindouli District, Brazzaville, Congo cabinet - 11 x 5 x 3.5 cm Bright and lustrous Dioptase crystals on a tan rock matrix. This specimen has interesting crystallization with both cup-shaped formations of solid Diptase and crystals with somewhat wheat-sheaf formations. There are also occasional tiny yellow Wulfenites present. Valued at $950. ©2010-2018 Marin Mineral |