Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Chemically Precipitated) Or Metamorphic
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
Chert
Chert (SiO2)
sedimentary
Quartzite (River Stone)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Marble (Calcitic)
Metamorphosed Limestone (CaCO3)
metamorphic
Brown Quartzite Pebble
Metadiagenetic Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble (Yellow/Cloudy Quartz)
Silicon Dioxide (SiO2) - Recrystallized Sandstone
metamorphic
Graphite
Graphite (Native Carbon, C)
Mineral
Chert (and Flint)
Chert (SiO2)
sedimentary
Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite (or Milky Quartz pebble)
Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)
metamorphic
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Native Gold (in earring form)
Gold (Au)
mineral
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Kyanite
Kyanite (Al2SiO5)
Mineral
Epidosite (Unakite-related)
Epidosite (predominantly Epidote, Ca2(Al2,Fe3+)(SiO4)3(OH))
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Hydrothermal Quartz or Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Pink Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (River Cobble)
Quartzite (mostly SiO2)
metamorphic
Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
mineral
Agate (Beads)
Silicon Dioxide (SiO2)
mineral
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Ruby (Pink to Red Corundum)
Al2O3 (Corundum with Chromium impurities)
mineral
Quartz / Quartzite Pebble
Silicon Dioxide (SiO2)
metamorphic
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)
Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Mineral
Chert (Quartz Variety)
Chert (mostly SiO2 / Silicon Dioxide)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Soapstone (Steatite) carving
Steatite (primarily Talc, Mg3Si4O10(OH)2)
metamorphic
Yellow Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic