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mediocre: Birefringence in calcite
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mediocre: Birefringence in calcite
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mediocre: Dolomite with malachite in calcite
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mediocre: Fluorite crystals
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mediocre: Pyrite cubes
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mediocre: The Earth's Treasury
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mediocre: The Earth's Treasury
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mediocre: Amethyst
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mediocre: Mineralien den Schweiz
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mediocre: Mineral collection
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mediocre: Aragonite
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mediocre: Sulphur
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mediocre: Desert rose
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mediocre: Collection
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mediocre: Quartz
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mediocre: Some more minerals
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mediocre: Calcite
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mediocre: Possibly aventurine
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mediocre: Azurite malachite
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mediocre: Some sort of hexagonal matrix
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mediocre: Plate with an agate meal for two
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mediocre: Agate geode in amethyst quarz
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mediocre: Small crystal hollow
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mediocre: Eye of Sauron
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mediocre: Filled with crystals
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mediocre: Geodes
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mediocre: The blue hole
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mediocre: Swirls
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mediocre: Droopy agate
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mediocre: Multi-directional