Greywacke
Lithic Sandstone (Greywacke)
sedimentary
Category
Mixed (Sedimentary, Igneous, And Metamorphic)
Browse mixed (sedimentary, igneous, and metamorphic) specimens identified by the Rock Identifier community.
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Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Chalcedony Agate / Carnelian nodules in Matrix
SiO2 (Silicon Dioxide) with iron oxide inclusions
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Asphalt (Bituminous pavement fragment)
Artificial conglomerate / Bitumen-Aggregate mixture
sedimentary
Polygenetic Conglomerate (Puddingstone)
Conglomerate (SiO2 matrix with mixed clasts)
sedimentary
Gossan (Iron Cap)
Limonitic Gossan (Fe2O3·nH2O mixed)
sedimentary
Unakite (likely)
Epidote–pink feldspar–quartz rock; commonly termed unakite
metamorphic
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
sedimentary
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Mineral and Rock Collection (Assorted)
Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine
mineral
Graywacke (River Cobble)
Graywacke (Lithic Sandstone)
sedimentary
Yellow Chert (Chert / Jasper)
Silicon Dioxide (SiO2 / Microcrystalline Quartz)
sedimentary
Jasper and Quartz Pebble
Silicon dioxide (SiO2) microcrystalline quartz variety
sedimentary
Dearest Ring (Gemstones)
Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)
mineral
Carved Stone Turtle
Mixed stone carving
carved stone
Chakra Crystal Bracelet
Mixed Mineral Assortment
gemstone
Polished agate or jasper cabochon
Cryptocrystalline quartz, SiO₂, possibly iron-rich jasper inclusions
gemstone
Asphalt / Bituminous Aggregate
Bituminous mixture (Hydrocarbon-based sediment)
sedimentary
Pyrite in Quartz
FeS2 (Iron Pyrite) with SiO2 (Quartz)
Mineral/Igneous/Hydrothermal
Granite (Pink/Potassium Feldspar Granite)
Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)
igneous
Magnetite
Magnetite (Fe3O4)
mineral
Glauconitic Sandstone
Glauconitic Sandstone (Quartz with Glauconite)
sedimentary
Pink Granite
Phaneritic Plutonic Felsic Rock (K-feldspar rich)
igneous
Yellow Jasper
Jasper (Silicon Dioxide with Iron Hydroxide impurities, SiO2 + FeO(OH))
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Tumbled jasper or chalcedony pebble
Microcrystalline quartz (SiO₂), likely jasper/chalcedony with iron-oxide staining
mineral
Granite (Pink/Alkali Feldspar Granite)
Plutonic Igneous Rock (Granite)
igneous
Tumbled Mineral Collection (Amethyst, Celestite, K2 Jasper, Rose Quartz, Ruby in Zoisite, Que Sera Stone)
Mixed Mineral Specimens (Quartz SiO2, Celestite SrSO4, Corundum Al2O3 with Zoisite, etc.)
mineral
Granite and Mixed Landscape Gravel
Plutonic Igneous Rock / Weathered Alluvium
igneous
Bumblebee Jasper
Anhydrite with Sulfur, Hematite, and Orpiment (SiO2/CaSO4 mixture)
sedimentary
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Granite
Granite; primarily quartz, alkali feldspar, plagioclase, and biotite/hornblende
igneous
Conglomerate
Conglomerate (Sedimentary Clastic Rock)
sedimentary
Quartz with Iron Oxide Staining
Silicon Dioxide (SiO2)
mineral
Asphalt (Bituminous pavement)
Bituminous concrete / Asphalt
Sedimentary (Anthropogenic)
Strawberry Quartz
Quartz with Hematite inclusions (SiO2 + Fe2O3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Mica
Mica group (often Muscovite or Biotite)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
gemstone
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Quartzite with Schist layers
Metamorphosed Quartz-rich Rock (Mixed Schist/Quartzite)
metamorphic