Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Category
Mineral In Igneous Rock
Browse mineral in igneous rock specimens identified by the Rock Identifier community.
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Red Granite
Phaneritic Plutonic Rock (High Potassium Feldspar)
igneous
Sandstone (with Iron Staining)
Arenite (primarily SiO2 with Fe2O3/FeO(OH) oxides)
sedimentary
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt
Igneous
Nephrite Jade (or Serpentine)
Nephrite (a variety of amphibole mineral tremolite-actinolite) or Serpentine Group minerals
Mineral/Rock
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Granite Gneiss
High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Garnet (likely Pyrope or Almandine)
Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.
Mineral
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Bull Quartz)
Silicon Dioxide (SiO2)
mineral
Hematite
Hematite (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gneiss (Stream-worn Cobble)
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)
metamorphic
Basalt with Pahoehoe flow texture
Vesicular Basalt (Aphanitic Mafic Igneous Rock)
igneous
Pumice (Vesicular Rhyolite/Andesite)
Pumice (a highly vesicular volcanic glass/extrusive igneous rock)
igneous
Gneiss (specifically a granitic gneiss cobble)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Basalt
Basalt (Fine-grained extrusive igneous rock)
igneous
Obsidian / Volcanic Glass
Obsidian (principally SiO2, usually 70% or more)
igneous
Obsidian (Black)
Obsidian (approx. 70–75% SiO2)
igneous
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Peridotite
Ultramafic intrusive igneous rock (composition: (Mg, Fe)2SiO4)
igneous
Quartz pebble
Silicon dioxide (SiO2)
Mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Crystal variety)
Silicon Dioxide (SiO2)
mineral
Arkosic Sandstone (or Conglomeritic Sandstone fragment)
Arkose (rich in feldspar)
sedimentary
Yellow Quartz (Citrinated Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt (Greenstone)
Amygdaloidal Basalt / Chloritized Basalt
Igneous
Vesicular Basalt (Scoria)
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Basalt with Quartz Infill
Aphanitic Mafic Igneous Rock with Silica (SiO2) inclusion
igneous