Milky Quartz Vein in Mafic Rock
Quartzite vein in Metabasalt (SiO2 base)
metamorphic
Category
Sedimentary Or Igneous (Host Environment)
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Pyrite-bearing rock (likely pyrite in quartz or altered host rock)
Pyrite, FeS₂, intergrown with quartz and/or iron-rich matrix
mineral
Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Tumbled yellow chalcedony (likely citrine or yellow quartz)
Quartz, SiO₂; potentially microcrystalline chalcedony
mineral
Quartz (Milky or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Rounded gray pebble
Unidentified lithic pebble; likely quartz-rich sandstone, quartzite, or fine-grained igneous rock
sedimentary
Carnelian
Carnelian (Red Chalcedony), SiO2 (Silicon Dioxide with iron oxide impurities)
mineral
Milky Quartz
Silicon dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) in Geodic cavity
sedimentary
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Quartz–feldspar pegmatite
Granitic pegmatite, chiefly quartz (SiO₂), feldspar, and mica
igneous
Yellow Quartz (Citrine Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Mica (Biotite or Phlogopite variety)
Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)
mineral
Ironstone Nodules (Iron Concretion)
Siderite or Hematite Concretion
sedimentary
Pegmatite
Igneous Pegmatite
igneous
Pegmatite
Igneous Pegmatite
igneous
Quartz vein in host rock
Milky quartz (SiO₂), likely in a metamorphic host such as schist or gneiss
metamorphic
Chert (Common Opal/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pegmatite (Quartz with Tourmaline/Biotite inclusions)
Igneous Pegmatite
igneous
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Siltstone (Yellow/Brown Sandstone or Siltstone)
Siltstone / Fine-grained Sandstone (rich in iron oxides like limonite)
sedimentary
Quartz-veined Basalt or Limestone Pebble
Quartz vein in host rock (Silicate mineral in carbonate or volcanic matrix)
sedimentary
White Quartz
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Rock Fragment with Calcite/Quartz Vein
Polymictic Rock Fragment (SiO2 / CaCO3)
igneous
Pyrite Nodules / Weathered Pyrite
Iron Sulfide (FeS2)
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Granite
Crystalline Silicon Dioxide (SiO2) in Granitic Matrix
mineral/igneous
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
Mineral
Smoky Quartz in Matrix
Silicon dioxide (SiO2) within Pegmatite/Gneiss
igneous
White tumbled stone, likely quartz or calcite
Indeterminate; possibly quartz (SiO₂) or calcite (CaCO₃)
mineral
Likely rough garnet
Garnet group, possibly almandine (Fe₃Al₂(SiO₄)₃); identification is uncertain from the image
mineral
Lapis Lazuli
Lapis lazuli (complex rock primarily composed of Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2 with Calcite and Pyrite)
metamorphic