Marble
Recrystallized Calcite (CaCO3)
metamorphic
Category
Metamorphic, Likely Sedimentary With Quartz Veins
Browse metamorphic, likely sedimentary with quartz veins specimens identified by the Rock Identifier community.
Blue Chalcedony
Microcrystalline Quartz (SiO2)
mineral
Gneiss (Granitic Gneiss)
Gneiss (from German Gneis, related to 'spark')
metamorphic
Yellow Jasper
Jasper (Silica-rich Microcrystalline Quartz, SiO2)
sedimentary
Gastropod Fossil (Snail Steinkern)
Class Gastropoda fossil, composed of Calcium Carbonate (CaCO3)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss (Metamorphic Cobble)
Gneiss
metamorphic
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)
metamorphic
Druzy Quartz (part of a Geode)
Silicon Dioxide (SiO2)
mineral
Peridot and Citrine Gemstones (in a ring setting)
Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Orange Quartz (or Tumbled Carnelian)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Quartz Vein in Host Rock (Pebble)
Quartz (SiO2) with sandstone or siltstone matrix
metamorphic/igneous transition
Chert (varietal: Jasper or Flint likely, but definitive identification is difficult from image)
SiO₂ (silicon dioxide)
Sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Glacial Erratic (Sandstone/Quartzite)
Glacial Erratic specimen (likely Orthoquartzite or Feldspathic Sandstone)
sedimentary or metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral / metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Gneiss
High-grade regional metamorphic rock (Foliated)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
mineral
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst
Quartz (Silicon Dioxide, SiO2) with iron impurities
mineral
Nephrite Jade (River Cobble)
Nephrite (Silicate mineral: Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins)
Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)
igneous or sedimentary
Yellow Quartz (Citrine or Yellow Chalcedony)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Milky Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Basanite variety) with Quartz Vein
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite (River Pebble)
Metamorphic Quartz (SiO2)
metamorphic
Carnelian
Carnelian (a variety of Chalcedony, SiO ₂)
Mineral (specifically a variety of Chalcedony, which is a cryptocrystalline quartz)
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
River Stone (Granitic Gneiss)
Foliated Granitic Gneiss
metamorphic
Jasper (Red Jasper)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Amazonite
Microcline (variety Amazonite) - K(AlSi3O8)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic