Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)
Browse organic (if resin) or synthetic (if glass); simulating sedimentary or metamorphic (for natural stones) specimens identified by the Rock Identifier community.
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Granite (Water-worn Cobble)
Phaneritic Felsic Intrusive Igneous Rock
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Septarian Nodule (Dragon Stone)
Septarian Concretion (CaCO3 with Siderite and Calcite)
sedimentary
Citrine
Silicon dioxide (SiO2)
mineral
Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Titanium Coated Kyanite (Aura Kyanite)
Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating
metamorphic
Smoky Quartz
SiO2 (Silicon Dioxide with aluminum impurities)
mineral
Shale
Argillaceous Rock
sedimentary
Larimar
Pectolite (a blue variety of Pectolite)
Mineral
Sandstone
Arenite
sedimentary
Yellow Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Chert (variant Flint)
Silicon Dioxide (SiO2)
sedimentary
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Mahogany Obsidian
Volcanic Glass with Hematite inclusions (SiO2 + Fe2O3)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
mineral
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
sedimentary
Sandstone (Stream-rounded Cobble)
Arenite (composed primarily of SiO2, Silica)
sedimentary
Mookaite Jasper
Silicified Radiolarite (SiO2 with iron impurities)
sedimentary
Fossilized Megalodon Tooth Fragment
Otodus megalodon (Carcharocles megalodon fossil)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Fluorite (likely)
Calcium Fluoride (CaF2)
Mineral
Jade
Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.
Mineral/Metamorphic Rock (Nephrite or Jadeite)
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Agate (Moss or Banded Agate variety)
Agate (Silicon Dioxide - SiO2)
mineral
Citrine Geode Fragment
Citrine (Silicon Dioxide with Iron Impurities), SiO2
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Pearl (Imitation or Cultured)
Calcium Carbonate (Aragonite/Calcite) - CaCO3
Mineraloid (Organic)
Amethyst
Amethyst (variety of Quartz, SiO2)
mineral
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
mineral
Quartz (Citrine variety)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Smoky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Carnelian (a variety of Chalcedony)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
Mineral
Yellow Quartz (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Mineral