Turquoise (likely stabilized or Howlite/Magnesite imitation)
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
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.
Corundum (Sapphire in Host Rock)
Corundum (Aluminum Oxide, Al2O3)
mineral
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Granite
Granite (a felsic intrusive igneous rock)
igneous
Diamond
Carbon (C), specifically in an isometric crystal system.
Mineral
Citrine (likely Heat-Treated Amethyst)
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (70-75% SiO2 with MgO and Fe3O4)
igneous
Granite
Felsic Intrusive Igneous Rock
igneous
Dyed Agate (Tumbled)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert / Flint (a variety of Chert)
Chert (SiO2)
Sedimentary Rock (technically a microcrystalline quartz mineral aggregate)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Jasper (a cryptocrystalline variety of Quartz, SiO₂)
Sedimentary Rock
Blue Aventurine
Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions
mineral
Granite
Phaneritic intrusive igneous rock (primarily SiO2)
igneous
Carnelian
Carnelian Chalcedony (SiO2 with Iron Oxide impurities)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
organic mineraloid
Green Tiger's Eye
Silicified Crocidolite (Quartz variety, SiO2)
metamorphic
Sea Shell (Fighting Conch Fragment)
Calcium Carbonate (CaCO3) - Strombus alatus fragment
sedimentary (biogenic)
Amethyst Quartz
Amethyst (Silicon Dioxide, SiO2)
mineral
Adventurine (Green)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 + Muscovite/Fuchsite)
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite on Quartz matrix
Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Amethyst Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Metamorphic
Shale creek bed
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Strawberry Quartz
Silicon Dioxide (SiO2) with inclusions of Goethite or Hematite
Mineral
Moonstone (bead form)
Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar
Mineral
Herkimer Diamond (Quartz)
Silicon Dioxide (SiO2)
mineral
Druzy Quartz on Milky Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Blue Lace Agate (Geode/Druzy variant)
Chalcedony (SiO2) with Quartz druzy
mineral
Prehnite
Prehnite Ca2Al2Si3O10(OH)2
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Peridot
Olivine (Mg,Fe)2SiO4
Mineral