Quartz with Tourmaline and Iron Staining
Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
Category
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Quartz with Tourmaline and Iron Staining
Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
Granite
Granite (Felsic intrusive igneous rock)
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Obsidian
Obsidian (Volcanic Glass, primarily SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Granite
Granite (Felsic intrusive igneous rock)
Gneiss
Gneiss (high-grade metamorphic rock)
Granite
Phaneritic Felsic Intrusive Igneous Rock
Mixed Gemstone Beaded Jewelry
Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
Banded Agate
Silicon Dioxide (SiO2)
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
Smoky Quartz
Silicon Dioxide (SiO₂)
Biotite Mica in Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) in Quartz (SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Gold Placer (Gold Flakes and Nuggets)
Native Gold (Au)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Labradorite
(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)
Citrine
Silicon dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz (with complementary stones in jewelry setting)
Smoky Quartz (Silicon Dioxide - SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Peridot
Olivine (Mg, Fe)2SiO4
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Citrine
Silicon dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
Carnelian Agate
Carnelian (Silicon Dioxide - SiO2)
Star Ruby
Corundum (Al2O3 with chromium and rutile inclusions)
Smoky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Carnelian
SiO2 (Silicon Dioxide) - Carnelian variety of Chalcedony
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
Milky Quartz
Silicon Dioxide (SiO2)
Labradorite (Schiller Spar)
(Na,Ca)(Al,Si)4O8
Rose Quartz
Silicon dioxide (SiO2)
Quartz (Smoky/Grey variety)
Silicon Dioxide (SiO2)
Banded Agate (specifically Black Sardonyx/Onyx variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz