Quartz (Quarzite or Massive Quartz vein)
Silicon Dioxide (SiO2)
metamorphic
Category
Mineral Health
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Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Phaneritic Quartz Monzonite)
igneous
Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)
Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein
igneous or sedimentary
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Rutilated Quartz (with Garnet pendant)
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
mineral
Amethyst
Amethyst is a variety of Quartz (SiO₂)
Mineral
Agate
SiO2 (Silicon dioxide, chalcedony variety)
Mineral
Mica (specimen appears to be Muscovite or Phlogopite)
Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2
Mineral (Found in Igneous and Metamorphic rocks)
Green Aventurine
SiO2
mineral
Amygdaloidal Basalt
Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Blue Dumortierite in Quartz
Al7(BO3)(SiO4)3O3 (Dumortierite)
mineral
Chalcopyrite in Quartz (Gold-bearing Ore)
CuFeS2 (Chalcopyrite)
mineral
Pegmatite (Granitic)
Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)
igneous
Granite
Granite (a felsic intrusive igneous rock composed primarily of quartz, feldspar, and mica)
igneous
Sandstone (Green/Yellow Siltstone variant)
Arenite or Siltstone (primarily SiO2 with mineral staining)
sedimentary
Banded Gneiss with Quartz Vein
Gneiss containing SiO2 (Quartz) intrusion
metamorphic
Gneiss with Quartz/Feldspar Vein
Quartz-Feldspathic Gneiss
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)
mineral
Rose Quartz
Rose Quartz (SiO2)
mineral
Green Kyanite
Kyanite (Al2SiO5)
mineral
Botryoidal Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Quartz (Citrine or Smoky variety)
Silicon Dioxide (SiO2)
mineral
Psilomelane (Black Hematite varietal)
Barium Manganese Oxide (Ba,H2O)2Mn5O10
mineral
Garnet (specifically Almandine)
Almandine - Fe3Al2(SiO4)3
metamorphic
Caliche (also known as hardpan, calcrete, kankar)
Primarily composed of calcium carbonate (CaCO₃), often mixed with other minerals like quartz, clay minerals, and iron oxides.
Mineral
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Jasper (Multi-color Chert)
Silicon dioxide (SiO2)
sedimentary
Red Sandstone
Ferruginous Sandstone
sedimentary
Quartz (specifically Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
mineral
Sandstone (Fluvial Pebble)
Arenite
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary