Red Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary Or Metamorphic Derived
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Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (on the right) and Magnetite or Hematite (on the left)
Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)
mineral
Agate Geode
Chalcedony (SiO2 - Silicon Dioxide)
sedimentary (secondary mineral formation)
Gneiss (River Cobble)
Metamorphic Gneiss
metamorphic
Yellow Jasper
Silicon dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Ruby in Kyanite
Corundum in Disthene (Al2SiO5 + Al2O3)
metamorphic
Kyanite
Kyanite (Al2SiO5)
mineral
Phyllite
Phyllite (Intermediate grade metamorphic rock)
metamorphic
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Muscovite Schist with Quartz
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Kyanite
Kyanite (Al2SiO5)
mineral
Rhodonite (in matrix)
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Mineral
Garnet in Matrix (Schist or Quartz)
Almandine Garnet, Fe3Al2(SiO4)3
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Mixed Mineral Collection
Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky/Crystalline fragment)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Clear/Milky)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Specular Hematite with Quartz and Limonite
Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)
Mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Yellow variety)
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Anthracite Coal
Anthracite (Carbon C)
metamorphic
Pyrite
Iron Pyrite (FeS₂)
Mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Garnet in Host Rock
Garnet Group (A3B2(SiO4)3)
metamorphic
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Banded Slate
Slate (Metamorphosed Siltstone/Mudstone)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Healer's Gold (Pyrite and Magnetite in Schist)
Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist
metamorphic