Sandstone
Sandstone (lithified arenite/wacke)
Sedimentary Rock
Category
This Appears To Be A Man Made Metallic Object, Likely Jewelry, Not A Natural Rock, Mineral, Or Geological Specimen.
Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.
Citrine (Heat-Treated Amethyst)
Silicon Dioxide (SiO2)
mineral
Dyed Agate
Silicon Dioxide (SiO2) with synthetic dyes
mineral
Chert (specifically Flint or Common Chert node)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Milk/Citrine variety)
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borosilicate (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Agate (Polished Nodule)
Agate (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hag Stone
Porous sedimentary rock (typically Flint, Chert, or Sandstone) with naturally occurring holes
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Rhodonite
Rhodonite (MnSiO3)
mineral
Snakeskin Agate
Cryptocrystalline Quartz (SiO2)
mineral
Amethyst (Purple Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Emerald In Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
mineral
Sandstone (Cross-bedded Drill Core)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Turquoise (likely Stabilized or Dyed Howlite/Magnesite)
Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Chert (Jasper/Agate variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Feldspathic Granite (likely Syenite or Granite Pegmatite)
Phaneritic Acidic Igneous Rock (KAlSi3O8 dominant with SiO2)
igneous
Basalt
Mafic extrusive volcanic rock (composed primarily of Plagioclase feldspar and Pyroxene)
igneous
Jasper and Yellow Chert (Tumbled)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Red Tiger's Eye beads
Tiger's Eye (variety of Chalcedony, SiO2)
Mineral / Gemstone (variety of Quartz)
Azurite-Malachite (often a mixed specimen)
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2(CO3)(OH)2. The specimen appears to be a natural mixture or intergrowth of these two minerals.
Mineral
Citrine
Quartz (SiO₂)
mineral
Smoky Quartz
Smoky Quartz (SiO2: Silicon Dioxide)
mineral
Granite
Granite (a plutonic igneous rock)
Igneous
Moqui Marble (Shaman Stone)
Ironstone Concretion (Fe2O3) - primarily Hematite or Goethite shell with Sandstone core
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Amethyst
Quartz (SiO2) with trace iron impurities
Mineral
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Zinc Ore (Sphalerite in Matrix)
Sphalerite (Zn,Fe)S within a carbonate or silicate host rock
mineral
Quartz (Gray/Smoky Varieties)
Silicon Dioxide (SiO2)
mineral
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Mineral
Basalt (Vesicular)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Amethyst (Variety of Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Mineral
Gemstones (Emerald and Yellow Topaz or Citrine)
Beryl (Be3Al2Si6O18) and Quartz (SiO2) or Topaz (Al2SiO4(F,OH)2)
mineral
Quartz (Milky Variant)
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous