Banded Gneiss with Quartz Vein
Gneiss containing SiO2 (Quartz) intrusion
metamorphic
Category
Mineral
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Gneiss with Quartz/Feldspar Vein
Quartz-Feldspathic Gneiss
metamorphic
Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Copper Ore (likely Malachite or Chrysocolla staining)
Copper Secondary Mineral (e.g., Cu2CO3(OH)2)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Asphalt (Road Aggregate)
Asphalt concrete / Bituminous mixture
anthropogenic sedimentary (technolith)
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Granite or Granodiorite (weathered fieldstone)
Granitoid
igneous
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
Amazonite
Amazonite (KAlSi3O8 – a variety of Microcline, a Potassium Feldspar)
mineral
Schist
Mica Schist
metamorphic
Crushed Stone / Gravel
Aggregatus saxum (variable mineral composition)
sedimentary
Fossilized Shark Tooth
Elasmobranchii (Class) fossil
fossil
Shale
Fissile mudstone (primarily clay minerals and silt-sized quartz)
sedimentary
Granite
Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Pinkish-Orange Variety)
Crystalline Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Flint Pebble)
Microcrystalline quartz (SiO2)
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Massive Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Quartz / Quartzite
Silicon Dioxide (SiO2)
Mineral / Metamorphic
Quartz (Quarzite or Massive Quartz vein)
Silicon Dioxide (SiO2)
metamorphic
Green Aventurine (Green Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
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 intrusive igneous rock)
igneous
Milky Quartz with Chlorite/Amphibite Inclusions
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Schist
Mica Schist
metamorphic
Bornite
Copper Iron Sulfide (Cu5FeS4)
mineral
Schist
Mica Schist
metamorphic
Schist
Mica Schist
metamorphic
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 (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Tiffany Stone
Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)
mineral
Green Aventurine in Host Rock
Quartz (SiO2) with Fuchsite inclusions
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral