Granite Pebbles
Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)
igneous
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
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Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Diamond
Native Carbon (C)
mineral
Banded Agate (specifically Carnelian Agate)
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Emerald (variety of Beryl) - Be3Al2(SiO3)6
mineral
Hematite Nodules (Moqui Marbles)
Ferric Oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Gold Ore in Quartz
Native Gold (Au) in Quartz (SiO2) matrix
mineral
Amber
Succinite (Approximate formula: C10H16O)
mineral
Beryl (Variety: Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Granite (specifically Red Granite)
Phaneritic Plutonic Rock (High in Alkali Feldspar and Quartz)
igneous
Sunstone
Heliolite (Sodium Calcium Aluminum Silicate with Iron or Copper inclusions)
mineral
Yellow Ochre / Limonite
Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)
mineral
Granitic Pegmatite with Schorl
Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
White Topaz
Al2SiO4(F,OH)2 (Aluminium Silicate Fluoride Hydroxide)
mineral
Specular Hematite
Specularite (Iron Oxide, Fe2O3)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Rhodochrosite with Pyrite and Quartz
Manganese Carbonate (MnCO3)
mineral
Quartz Pebble (River Rock)
Silicon Dioxide (SiO₂)
Mineral
Specular Hematite with Quartz
Ferric oxide (Fe2O3) and Silicon dioxide (SiO2)
Mineral
Peridotite
Peridotite (Ultramafic Rock)
igneous
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Silver (Native Silver/Alloy Specimen)
Ag (Native Silver element), specifically a 90% Ag / 10% Cu alloy
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Diamond (in jewelry setting)
Adamantine Carbon (C)
mineral
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Jade (likely Nephrite)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Gold Ore in Quartz
Auriferous Quartz (SiO2 with Au inclusions)
mineral
Beryl (var. Heliodor or Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Lepidolite in Quartz (Lithium-bearing Ore)
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) and Quartz (SiO2)
igneous/mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Arsenopyrite
Arsenopyrite (FeAsS)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Peridotite (with Olivine)
Peridotite (rich in Olivine, (Mg,Fe)2SiO4)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Basalt (Concrete Aggregate)
Basalt (Mafic volcanic rock)
igneous