Moss Agate with Jasper
Chalcedony (SiO2 with inclusions)
mineral
Category
Mineral In Igneous Rock
Browse mineral in igneous rock specimens identified by the Rock Identifier community.
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Vesicular Basalt with Epidote
Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
igneous
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Dalmatian Stone
Dalmatian Stone (formerly called Dalmatian Jasper)
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Eclipse Stone (Kabamba Jasper)
Rhyolite with Aegirine (NaFe3+Si2O6)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Decorative polished pebbles
Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt
mineral
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt Pebble
Aphanitic Mafic Igneous Rock
igneous
Granite
Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)
igneous
Granite
Felsic intrusive igneous rock
igneous
Weathered igneous rock fragment, possibly granite or granitic gneiss
Indeterminate; likely quartz–feldspar–mica aggregate (granite), possibly foliated gneiss
igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
River Pebble (Granite/Gneiss)
Granitic Pebble / Quartz-Feldspar Aggregate
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Granite and Mixed Landscape Gravel
Plutonic Igneous Rock / Weathered Alluvium
igneous
Magnetite (potentially Hematite)
Magnetite (Fe₃O₄)
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Extrusive Igneous Rock (Mafic)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Diorite (River Rock)
Intermediate plutonic igneous rock
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Granite
Felsic intrusive igneous rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Weathered schist or gneiss fragment
Quartz–feldspar–mica metamorphic rock; likely mica schist or gneiss
metamorphic
Weathered granite (feldspathic, iron-stained granite)
Granite; primarily quartz, potassium feldspar, plagioclase feldspar, and minor mica/amphibole. Exact identification is uncertain from a single photograph.
igneous
Granite
Felsic intrusive igneous rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Mixed river-worn rock and mineral collection
Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble
igneous, sedimentary, metamorphic, mineral
Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz / Quartzite)
Silicon Dioxide (SiO2)
mineral
Granite
Granite
igneous
Quartz with Schorl (Black Tourmaline)
Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Granite Cobble / Gneiss (River Rock)
Granitic Gneiss / Felsic Igneous Rock
igneous