Quartz Fragment
Silicon Dioxide (SiO2)
mineral
Category
Mineral, Often Found As A Rock (Metamorphic)
Browse mineral, often found as a rock (metamorphic) specimens identified by the Rock Identifier community.
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Black Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Basalt with Quartz/Calcite Veins
Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)
igneous
Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
mineral
Strawberry Quartz (Quartz with Hematite inclusions)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Gneiss (Stream-worn Cobble)
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)
metamorphic
Quartzite
Quartzite
Metamorphic rock
Gneiss
Gneiss
metamorphic
Sapphire
Corundum (Al2O3)
Mineral
Tiger's Eye (Unpolished)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 + Muscovite/Fuchsite)
metamorphic
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Tiger's Eye
Tiger's Eye (a variety of Quartz, SiO₂)
Mineral (specifically a gemstone variety)
Fire Opal
Hydrated Silica (SiO2·nH2O)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Ironstone Concretion (Nutstone)
Ironstone (with High Limonite/Hematite Content)
sedimentary
Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Aquamarine (Pendant) and Jasper (Beads)
Beryllium aluminum silicate (Be3Al2Si6O18) with Chalcedony (SiO2)
mineral
Banded Agate (specifically Eye Agate / Chalcedony)
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)
igneous
Sandstone
Arenite
sedimentary
Nephrite Jade
Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2
Mineral
Smoky Quartz (Tumbled)
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Kyanite (Green and Blue varieties)
Kyanite (Al2SiO5)
mineral
Rough Ruby
Corundum (Al2O3) with Chromium traces
mineral
Rhodonite in Quartz Matrix
Rhodonite (Manganese Iron Magnesium Calcium Silicate - Mn,Fe,Mg,Ca)SiO3
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Pink Polished Marble (or Limestone) Pillar
Recrystallized Calcium Carbonate (CaCO3)
metamorphic
Stichtite in Serpentine (Atlantasite)
Mg6Cr2CO3(OH)16·4H2O in Mg3Si2O5(OH)4
metamorphic
Greenschist
Greenschist (Actinolite-Chlorite Schist)
metamorphic