Larimar (Pectolite)
NaCa2Si3O10(OH) (Sodium Calcium Silicate Hydroxide)
mineral
Category
Mineral, Specifically A Detrital Grain
Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.
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Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Green Quartz (Aventurine)
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Milky Quartz or Moonstone
Silicon Dioxide (SiO2) or Potassium Aluminum Silicate (KAlSi3O8)
mineral
Green Kyanite
Kyanite (Al2SiO5)
mineral
Sardonyx Cameo
Silicon Dioxide (SiO2) - variety Cryptocrystalline Quartz
Mineral
Pink Granite
Granite (Phaneritic igneous rock)
igneous
Tumbled chalcedony (likely milky agate)
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Pyrite Sun
Iron Sulfide (FeS2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)
mineral
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities and gamma radiation exposure
Mineral
Yellow Jasper
Silicon dioxide (SiO2)
mineral
Fossil Coral
Hexagonaria (Rugose coral) / Rugosa
fossil
Multi-Gemstone Quartz Bracelet (Amethyst, Aventurine, Rose Quartz, Clear Quartz)
Silicon Dioxide (SiO2) mixture
gemstone
Puddingstone (specifically Gowganda Tillite or St. Joseph Island Puddingstone)
Jasper Conglomerate
sedimentary
Quartz (likely Rose or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ruby (Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz with Matrix
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Porphyry (specifically Porphyritic Basalt or Andesite)
Porphyritic extrusive igneous rock (Mg,Fe)2SiO4 (Olivine inclusions/Plagioclase Feldspar)
igneous
Sandstone with Brachiopod Mold Fossil
Sedimentary rock (Sandstone) with indeterminate Brachiopod mold
fossil
Basalt
Basalt
igneous
Gabbro
Gabbro (mafic intrusive igneous rock)
igneous
Pink Granite
Phaneritic Plutonic Felsic Rock (Granite)
igneous
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Quartz Sand (Beach Sand)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (specifically Agate and Carnelian variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Sandstone (Water-worn Cobble)
Arenite (SiO2 based)
sedimentary
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Mineral
Small dark mineral or rock fragment
Undetermined; possibly a dark mafic mineral such as biotite or magnetite
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Amethyst and Smoky Quartz (Tumbled)
Silicon Dioxide (SiO2) with trace impurities iron (Amethyst) and aluminum/radiation (Smoky Quartz)
mineral
Chert (and Cherty Limestone)
Silicon Dioxide (SiO2) with impurities
sedimentary