Schorl (Black Tourmaline) in Quartz and Feldspar
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
mineral
Category
Mineral In A Matrix (Likely Quartz Or Feldspar)
Browse mineral in a matrix (likely quartz or feldspar) specimens identified by the Rock Identifier community.
Drupa Quartz (Sparkly Drusy Quartz on Matrix)
Crystalline Silicon Dioxide (SiO2) on host rock
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Granite (River Pebble)
Phaneritic intrusive igneous rock (Felsic)
igneous
Rose Quartz with Schist Matrix
Silicon Dioxide (SiO2) with Mica-Schist
mineral
Granite Pebble
Granite (Phaneritic Quartz-Feldspar Rock)
igneous
Graphic Granite
Pegmatitic Granite (Quartz and Microcline KAlSi3O8)
igneous
Cinnabar in Quartz
Silicon Dioxide (SiO2) with Mercury Sulfide (HgS) inclusions
Mineral
Dalmation Stone (frequently called Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock
igneous
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Granite Pegmatite with Tourmaline and Muscovite
Pegmatite (Feldspar: KAlSi3O8, Quartz: SiO2, Schorl: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH))
igneous
Quartz with Inclusions
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Granite (Pink/Potassium Feldspar Granite)
Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)
igneous
Dalmatian Stone
Peralkaline rhyolite
igneous
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Beryl (var. Heliodor or Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Graphic Granite
Graphic Granite (a variety of Pegmatite)
igneous
Dalmatian Stone
Peralkaline Feldsphathic Igneous Rock
igneous
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Sandstone (likely Arkose)
Arenite (composed mainly of SiO2 with Feldspar)
sedimentary
Quartz Geode / Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Goldstone (Red)
Aventurine Glass
Man-made material (Simulated Mineral)
Beryl (Aquamarine) in Matrix
Beryllium aluminum silicate (Be3Al2(SiO3)6)
mineral
Garden Quartz
Silicon Dioxide (SiO2) with various inclusions (Lodolite)
mineral
Amazonite in Matrix
Potassium Feldspar (Microcline), KAlSi3O8
mineral
Quartz Veined Rock (Likely Graywacke or Quartzite)
Silicon Dioxide (SiO2) veins in Metasedimentary matrix
metamorphic
Dalmatian Stone (Dalmation Jasper)
Aplite with Arfvedsonite inclusions
igneous
Granitic Pegmatite with Tourmaline and Sphalerite
Pegmatite containing Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) and Sphalerite ((Zn,Fe)S)
igneous
Granite Pebble (Salt and Pepper Granite)
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Biotite/Amphibole)
igneous
Granitic Pegmatite
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)
Igneous
Dumortierite Quartz
Al7(BO3)(SiO4)3O3
mineral
Agate Jasper
Cryptocrystalline Quartz (SiO2) with impurities
mineral
Dalmation Jasper (Dalmation Stone)
Perthitic feldspar-quartz-amphibole rock
igneous
Graphic Granite
Graphic Granite (Granitic Pegmatite), typically KAlSi3O8 (Feldspar) + SiO2 (Quartz)
igneous
Granite
Granite (a felsic intrusive igneous rock)
Igneous
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Basalt with Mineral Vein (Cobble)
Basalt (with likely Quartz/Calcite vein)
Igneous
Porphyritic Basalt or Diabase with Plagioclase Phenocrysts
Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar
Igneous
Porphyritic Rhyolite (Birdseye Rhyolite)
Rhyolite (Porphyritic texture)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Granite Glacial Erratic
Intrusive Phaneritic Felsic Rock (Granite)
igneous