Yellow Jasper (Mookaite style)
Silicon Dioxide (SiO2) with Goethite/Hematite inclusions
sedimentary
Category
Mineral (Chalcedony Variety)
Browse mineral (chalcedony variety) specimens identified by the Rock Identifier community.
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Calcite
Calcite (Mineral, Calcium Carbonate - CaCO3)
Mineral
Chert (and Chalcedony/Agate mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Litharenite)
sedimentary
Pyrite
Iron Pyrite (FeS2)
Mineral
Pink Granite
Granite (Phaneritic igneous rock rich in Alkali Feldspar and Quartz)
igneous
Dragon Blood Jasper
Epidote with Red Jasper inclusions (SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
African Turquoise (Jasper)
Polychrome African Jasper (often marketed as 'African Turquoise' due to its color, but it is not true turquoise)
Rock
Sandstone
Arenite (primarily SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Black Opal
Amorphous Hydrated Silica (SiO2·nH2O)
mineral
Watermelon Tourmaline
Elbaite - Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3OH
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Schorl (Black Tourmaline)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Satin Spar (often marketed as Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Milky Quartz
Silicon Dioxide (SiO2)
Mineral
Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Complex Borosilicate)
mineral
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Selenite (Gypsum Variety)
Hydrous Calcium Sulfate (CaSO4·2H2O)
mineral
Schist
Mica Schist (Variable chemistry, often rich in muscovite and biotite)
metamorphic
Rough Corundum (likely Sapphire/Zircon-bearing)
Aluminium Oxide (Al2O3)
mineral
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Rose Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Marble
Recrystallized Calcite (CaCO3) Rock
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Black Opal
Hydrated Silica (SiO2·nH2O)
mineral
Prase Quartz on Feldspar
Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milk Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Nephrite Jade (or Serpentine)
Nephrite (a variety of amphibole mineral tremolite-actinolite) or Serpentine Group minerals
Mineral/Rock
Milky Quartz
Silicon Dioxide (SiO2)
mineral