Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
Learn about Mineral Based Composite in the encyclopedia
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Aquamarine with Quartz
Beryl (Be3Al2Si6O18) with Quartz (SiO2)
mineral
Dendritic Agate
Chalcedony (SiO2) with manganese/iron oxide inclusions
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite - Lithium-rich Mica)
mineral
Mica (Muscovite)
Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2
mineral
Conglomerate
Conglomerate (Sedimentary rock)
sedimentary
Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
sedimentary
Hag Stone
Perforated Sedimentary Rock (typically Limestone or Sandstone)
sedimentary
Quartz (Commonly referred to as a River Rock or Quartzite Pebble)
Silicon Dioxide (SiO2)
mineral/metamorphic
Quartz Veined Rock (Likely Graywacke or Quartzite)
Silicon Dioxide (SiO2) veins in Metasedimentary matrix
metamorphic
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Mineral
Sandstone (River Stone)
Arenite (composed primarily of SiO2)
sedimentary
Granite Pebble
Granite
igneous
Sandstone (lithic)
Lithic Wacke / Arenite
sedimentary
Diorite
Diorite (plutonic igneous rock)
igneous
Basalt (Black Beach Pebble)
Basalt
igneous
Biotite Schist
Biotite Mica Schist
metamorphic
Mica (Muscovite)
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
sedimentary
Basalt with Quartz Veins
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions
igneous
Granite
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Epidote with Quartz
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Weathered Quartzite or Chert Pebble
Silicon Dioxide (SiO2)
metamorphic or sedimentary
Yellow Topaz (Imperial/Golden Topaz)
Topaz - Al2SiO4(F,OH)2
gemstone
Conglomerate (or Breccia)
Clastic Sedimentary Rock (Conglomeratic)
sedimentary
Dark mafic rock, likely basalt
Basalt; chiefly plagioclase feldspar, clinopyroxene, and commonly olivine or iron oxides
igneous
Diorite
Diorite (intermediate plutonic rock)
igneous
Alkali Basalt with iron oxidation
Mafic Volcanic Rock (Fe-bearing Basalt)
igneous
Sandstone with Manganese Dendrites/Oxide coatings
Arenite with Pyrolusite and Romanechite (MnO2)
sedimentary
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
metamorphic
Bloodstone
Heliotrope (Cryptocrystalline Quartz, SiO2)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide
mineral
Chert (Flint variety)
Chert (SiO2)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Vesicular Basalt with Zeolite
Mafic volcanic rock with Hydrated Aluminosilicate minerals (Zeolite group)
igneous
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3/FeO(OH) cementing agents)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Mica Schist
Mica Schist (Complex Silicate Rock)
metamorphic