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This semi-precious stone is fascinating. A rare opal, sprouting in a piece of petrified wood.

Ring | AQA Contemporary Opal Designs | Boulder Opal

Mineral Chart: Includes all 6 crystal classes and presents the physical properties: hardness, habit, luster, cleavage, specific gravity, color, fluorescence, and streak.

Pallasite - a variety of Meteorite that has olivine crystals embedded inside a nickel iron matrix. From Esquel, Argentina

U shaped necklace / AMM Jewelry