| 0 | KAEMMERERITE (the chromium rich variety of cliniclore)
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| 0 | KAOLINITE (Aluminum Silicate Hydroxide)
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| 0 | KERMESITE (Antimony Oxysulfide)
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| 0 | KERNITE (Hydrated Sodium Borate)
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| 0 | KIDWELLITE (Hydrated Sodium Iron Phosphate Hydroxide)
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| 0 | KIESERITE (Hydrated Magnesium Sulfate)
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| 0 | KINOITE (Hydrated Calcium Copper Silicate)
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| 0 | KNAUFITE (alternate name for VOLBORTHITE, Copper Vanadate Hydroxide)
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| 0 | KOLWEZITE (Copper Cobalt Carbonate Hydroxide)
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| 0 | KORNERUPINE (Magnesium Aluminum Iron Boro-silicate Hydroxide)
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| 0 | KOTTIGITE (Hydrated Zinc Arsenate)
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| 0 | KOVDORSKITE (Hydrated Magnesium Carbonate Phosphate Hydroxide)
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| 0 | KTENASITE (Hydrated Copper Zinc Sulfate Hydroxide)
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| 0 | KULANITE (Barium Iron Manganese Magnesium Aluminum Phosphate Hydroxide)
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| Sale! 5 | KUNZITE (variety of Spodumene)
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| 0 | KUPLETSKITE (Potassium Sodium Manganese Iron Titanium Niobium Silicate Hydroxide)
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| 0 | KUTNOHORITE (Calcium Magnesium Carbonate)
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| Sale! 8 | KYANITE (Aluminum Silicate)
|