Druzy Quartz on Host Rock
Silicon Dioxide (SiO2) with various iron-oxide inclusions
mineral
Category
Sedimentary Or Metamorphic Derived
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
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Jasper
Silicon dioxide (SiO2)
sedimentary
Red Jasper (possibly with Quartz or Hematite)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary or metamorphic
Pyrite
Pyrite (FeS2)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
Mineral
Sunstone
Oligoclase or Andesine (Labradorite) Feldspar (Na,Ca)(Si,Al)4O8
mineral
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Calcite (Yellow/Orange variety - sometimes called Honey Calcite)
Calcite
Mineral
Quartz (likely a weathered/tumbled piece)
Quartz (SiO₂)
Mineral
Quartz
SiO₂ (Silicon Dioxide)
Mineral
Graphite
Graphite (Carbon, C)
Mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Sapphire (Raw/Rough)
Corundum (Al2O3)
mineral
Silver (Native Element / Alloy)
Silver (Ag)
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with natural radiation induced color centers
mineral
Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
mineral
Amethyst (Faceted)
Silicon Dioxide with Iron impurities (SiO2)
mineral
Agate (translucent slice)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Quartz
Quartz (SiO₂)
Mineral
Clear Quartz (Rock Crystal)
Quartz (SiO₂)
Mineral
Slate
Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.
sedimentary
Quartzite (Milky)
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartz with Mica (Schist/Pegmatite fragment)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
igneous/metamorphic
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Marble
Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)
Metamorphic Rock
Smoky Quartz (with Hematite inclusions)
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Grey Quartz Variant)
Silicon Dioxide (SiO2)
mineral
Silver (Sterling Silver)
Argentum (Ag) mixed with Copper (Cu); Formula: Ag+Cu
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (likely a clear or rock crystal variety)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Greenstone / Glauconitic Siltstone
Metabasalt or Glauconite-rich Sedimentary Rock
metamorphic or sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Precious Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral