Sedimentary rock with quartz veining
Laminated siltstone or mudstone with hydrothermal quartz veins
sedimentary
Category
Mineralogical Specimen
Browse mineralogical specimen specimens identified by the Rock Identifier community.
Learn about Mineralogical Specimen in the encyclopedia
View all →
Amygdaloidal Basalt
Amygdaloidal Basalt
igneous
Chert / Flint (with Crinoid Stem Molds)
Microcrystalline Quartz (SiO2)
sedimentary
Raw Diamond
Diamond (pure Carbon, C)
mineral
Quartz River Pebble with Algae
Silicon Dioxide (SiO2) with organic biofilm
metamorphic or igneous
Agate Geode
Silicon Dioxide (SiO2)
mineral
Chert Nodules (with Gryphaea or Shell inclusions)
Microcrystalline Quartz (SiO2) with Calcitic inclusions
sedimentary
Gold Ore in Quartz
Auriferous Quartz (SiO2 with Au inclusions)
mineral
Greenstone with Epidote or Quartz veins
Metabasalt (Greenstone facies)
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Green Chert/Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with FeO/Fe2O3)
sedimentary
Jasper with Epidote (Unakite-related)
Epidotized Quartzite (composed of Quartz, Epidote, and Feldspar)
metamorphic
Fossilized Shark Tooth
Otodus sp. (approximate genus) / Hydroxyapatite fossil
sedimentary
Amethyst (Agate/Chalcedony variety)
Silicon Dioxide (SiO2) with iron impurities
mineral
Granitic Quartz (with Feldspar inclusions)
Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)
igneous
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Rutilated)
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Quartz Geode Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Milky Quartz in Gneiss
Quartzite / Foliated Gneiss containing SiO2
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Green Jasper with Agate Banding
Silicon Dioxide (SiO2) with impurities of ferrous silicate or chlorite
sedimentary (chemical/biological origin)
Quartz / River Cobble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartzite
Quartzite (Primary mineral: Quartz, SiO2)
metamorphic
Fluorite Octahedron
Fluorite (Calcium Fluoride, CaF2)
mineral
Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
mineral
Granitic Quartz with Feldspar
Granite (composed primarily of SiO2 and KAlSi3O8)
igneous
Granodiorite Pebble
Granodiorite
igneous
Yellow Quartz (Citrine or Quartzite Pebble)
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite cobblestone
Quartzite (primarily SiO2)
metamorphic
Yellow Quartzite (River Pebble)
Quartzite (SiO2 with iron oxide impurities)
metamorphic
Chert (Jasper/Common Opal mix)
Microcrystalline Quartz (SiO2)
sedimentary