| 0 | ACANTHITE (Silver Sulfide) 
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| 0 | ACTINOLITE (Calcium Magnesium Iron Silicate Hydroxide) 
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| 0 | ADAMITE (Zinc Arsenate Hydroxide) 
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| 0 | AEGIRINE (Sodium Iron Silicate) 
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| 0 | AESCHYNITE (Yttrium Calcium Iron Thorium Titanium Niobium Oxide Hydroxide) 
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| 0 | AGATE (variety of Quartz - Silicon Oxide) 
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| 0 | AJOITE (Hydrated Potassium Sodium Copper Aluminum Silicate Hydroxide) 
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| Sale! 1 | ALBITE (Sodium Aluminum Silicate) 
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| 0 | ALEXANDRITE (variety of Chrysoberyl- Beryllium Aluminum Oxide) 
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| 0 | ALLANITE (Calcium Cerium Lanthanum Yttrium Aluminum Iron Silicate Hydroxide) 
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| 0 | ALLUVIAL (a type of unconsolidated sediments) 
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| 0 | ALMANDINE (Iron Aluminum Silicate) 
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| 0 | ALTAITE (Lead Telluride) 
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| Sale! 4 | ALUMINUM (Al) 
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| 0 | ALUNITE (Potassium Aluminum Sulfate Hydroxide) 
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| 0 | AMBER (Succinite: fossilized tree resin) 
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| Sale! 1 | AMBLYGONITE (Lithium Sodium Aluminum Phosphate Fluoride Hydroxide) 
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| Sale! 4 | AMETHYST (variety of Quartz- Silicon Oxide) 
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| 0 | ANALCIME (Hydrated Sodium Aluminum Silicate) 
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| 0 | ANAPAITE (Hydrated Calcium Iron Phosphate) 
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| 0 | ANATASE (Titanium Oxide) 
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| Sale! 2 | ANDALUSITE (Aluminum Silicate) 
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| 0 | ANDERSONITE (Hydrated Sodium Calcium Uranyl Carbonate) 
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| 0 | ANDESINE (Sodium Calcium Aluminum Silicate) 
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| 0 | ANDESITE (an extrusive igneous rock) 
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| 0 | ANDRADITE (Calcium Iron Silicate) 
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| 0 | ANGELITE (trade name for Anhydrite) 
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| Sale! 1 | ANGLESITE (Lead Sulfate) 
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| 0 | ANHYDRITE (Calcium Sulfate) 
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| 0 | ANKERITE (Calcium Iron Carbonate) 
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| 0 | ANNABERGITE (Hydrated Nickel Arsenate) 
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| 0 | ANORTHITE (Calcium Aluminum Silicate) 
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| 0 | ANORTHOSITE (a plutonic igneous rock) 
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| 0 | ANTHOPHYLLITE (Magnesium Iron Silicate Hydroxide) 
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| 0 | ANTIMONY (Sb) 
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| 0 | ANTLERITE (Copper Sulfate Hydroxide) 
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| Sale! 1 | APATITE (Calcium (Fluoro, Chloro, Hydroxyl) Phosphate) 
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| Sale! 3 | APOPHYLLITE (Hydrated Potassium Calcium Silicate Hydroxide Flouride) 
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| 0 | AQUAMARINE (variety of Beryl, Berylium Aluminum Silicate) 
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| Sale! 1 | ARAGONITE (Calcium Carbonate) 
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| 0 | ARFVEDSONITE (Sodium Iron Magnesium Silicate Hydroxide) 
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| 0 | ARGENTITE (Silver Sulfide) 
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| 0 | ARGYRODITE (Silver Germanium Sulfide) 
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| Sale! 1 | ARSENIC (As) 
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| Sale! 1 | ARSENOPYRITE (Iron Arsenide Sulfide) 
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| 0 | ARSENTSUMEBITE (Lead Copper Arsenate Sulfate) 
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| 0 | ARTHURITE (Hydrated Copper Iron Arsenate Phosphate Sulfate) 
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| 0 | ARTINITE (Hydrated Magnesium Carbonate Hydroxide) 
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| 0 | ASTEROIDS (primordial stony or metallic rocks in space) 
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| 0 | ASTROPHYLLITE (Potassium Iron Titanium Silicate Hydroxide) 
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| 0 | ATACAMITE (Copper Chloride Hydroxide) 
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| 0 | AUGELITE (Aluminum Phosphate Hydroxide) 
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| Sale! 1 | AUGITE (Calcium Sodium Magnesium Aluminum Iron Titanium Silicate) 
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| 0 | AURICHALCITE (Zinc Copper Carbonate Hydroxide) 
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| 0 | AUSTINITE (Calcium Zinc Arsenate Hydroxide) 
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| 0 | AUTUNITE (Hydrated Calcium Uranyl Phosphate) 
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| 0 | AXINITE (Calcium Iron Magnesium Manganese Aluminum Boro-Silicate Hydroxide) 
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| Sale! 2 | AZURITE (Copper Carbonate Hydroxide) 
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