Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Mineral_rock
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Quartz (Microcrystalline/Gravel)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Apatite
Fluorapatite / Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chalcopyrite (Peacock Ore)
Copper Iron Sulfide (CuFeS2)
mineral
Blue Quartzite
Metamorphic Rock (rich in Quartz, SiO2 with inclusions of Dumortierite or Magnesio-riebeckite)
metamorphic
Tiger's Eye (Raw)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Greenstone / Greenschist
Greenschist facies metamorphic rock (composed primarily of chlorite, actinolite, and epidote)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
metamorphic
Gneiss
Gneiss
metamorphic
Basalt with Quartz Vein
Mafic volcanic rock with hydrothermal SiO2 filling
igneous
Gneiss
Gneiss
metamorphic
Red Sandstone (Hematitic)
Clastic sedimentary rock (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based typically)
sedimentary
Sandstone
Arenite (SiO2 secondary)
sedimentary
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Gold in Quartz Ore
Hydrothermal Quartz with native Gold (Au)
mineral
Granodiorite
Granodiorite
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (Hydrated magnesium iron silicate)
metamorphic
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Boxwork Siderite or Sepatarian Nodule Weathering
Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment
sedimentary
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Azurite and Malachite on Matrix
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone (with Siltstone/Greywacke variations)
Sedimentary Rock (Clastic)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
sedimentary