Aragonite (Yellow/Honey Tumble)
Calcium Carbonate (CaCO3)
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Aragonite (Yellow/Honey Tumble)
Calcium Carbonate (CaCO3)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Banded Iron Formation
Banded Iron Formation (BIF)
Native Gold Nuggets
Native Gold (Au)
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
Gold Nugget
Native Gold (Au)
Milky Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Milky Quartz with Iron Oxide Staining
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Quartz (likely Clear Quartz or Rock Crystal)
Quartz (SiO2)
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Granite Cobble
Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)
Basalt (Weathered Pebble)
Extrusive mafic igneous rock; minerals primarily Plagioclase feldspar and Pyroxene
Basalt
Basalt
Milky Quartz
Silicon Dioxide (SiO2)
Rough Topaz
Aluminum silicate fluoride hydroxide [Al2SiO4(F, OH)2]
Diamond in Kimberlite
Diamond (C in Kimberlite Matrix)
Silver (Sterling Silver)
Argentum (Ag) mixed with Copper (Cu); Formula: Ag+Cu
Staurolite (Fairy Stone)
Staurolite (Fe2+2Al9Si4O23(OH))
Ruby
Corundum (Al2O3 with Chromium impurities)
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
Diamond
Native Carbon (C)
Lepidolite Polished Point
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Aquamarine
Beryl (Be3Al2Si6O18 with trace Fe2+)
Ruby
Corundum (Al2O3)
Granitic Pegmatite (with Pink Feldspar and Quartz)
Pegmatite (KAlSi3O8 + SiO2)
Yellow Quartzite
Quartzite (SiO2)
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Amber
Succinite (Approximate formula: C10H16O)
Sunstone
Oligoclase (Plagioclase Feldspar) - (Na,Ca)(Si,Al)4O8 with Hematite or Copper inclusions
Amethyst
Silicon dioxide (SiO2) with iron impurities
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Pegmatite (with Quartz and Feldspar)
Granitic Pegmatite
Pink Sapphire
Corundum (Al2O3) with Chromium/Iron/Titanium trace impurities
Ferruginous Quartz (Stained Quartz)
Silicon Dioxide (SiO2) with secondary Iron Oxide inclusions (Limonite/Hematite)
Diamond (in jewelry setting)
Diamond (Carbon, C)
African Turquoise (Jasper)
Polychrome African Jasper (often marketed as 'African Turquoise' due to its color, but it is not true turquoise)