Quartz Vein
Silicon Dioxide (SiO2)
Mineral
Category
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Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Quartz Vein in Granite
Crystalline Silicon Dioxide (SiO2) in Granitic Matrix
mineral/igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Smoky variety)
Silicon Dioxide (SiO2)
mineral
Quartz-veined Siltstone
Siltstone with Quartz (SiO2) veins
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with Trace Inclusions
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Banded Agate (specifically Botswana Agate or Water-line Agate)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) - Crystalline Quartz
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Mica Schist
Schist (Crystalline metamorphic rock)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Olivine Phenocrysts
Aphanitic Mafic Volcanic Rock (Basalt)
igneous
Gabbro (likely with Pyrite/Sulfide mineralization)
Mafic Intrusive Igneous Rock
igneous
Sandstone Cobble
Arenite (primarily Quartz Arenite)
sedimentary
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
mineral
Greenstone / Diorite
Intermediate plutonic igneous rock
igneous
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Sandstone (with potential iron-oxide weathering)
Arenite (SiO2 based)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Tumbled Agate
Silicon Dioxide (SiO2) with dye
mineral
Septarian Nodule
Septarian Nodule (Mixture of Calcite, Aragonite, and Limestone/Clay)
sedimentary
Gray River Pebble (likely Limestone or Siltstone)
Sedimentary Rock (Calcium Carbonate or Siliciclastic)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
sedimentary
Jasper (specifically Yellow or Bumblebee-like Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Schist
Mica Schist
metamorphic
Tiger's Eye
Silicon Dioxide with Crocidolite (SiO2)
mineral
Chrysocolla in Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Mica Schist
Mica Schist
metamorphic
Basalt with Quartz/Calcite matrix
Basalt (SiO2 with Ca/Mg/Fe silicates) on a Mineral Matrix
igneous
Gneiss (foliated metamorphic rock)
Gneiss
metamorphic
Diorite
Diorite (Phaneritic intermediate plutonic rock)
igneous