Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
metamorphic
Category
Mineral Like Biological Tissue
Browse mineral like biological tissue specimens identified by the Rock Identifier community.
Learn about Mineral Like Biological Tissue in the encyclopedia
View all →
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Green Quartzite
Quartzite (primarily SiO2 with chromium-rich mica/fuchsite impurities)
metamorphic
Limonite-stained Granite
Felsic Plutonic Rock with Hydrated Iron Oxides
igneous
Granite Gneiss
Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)
metamorphic
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Schorl (Black Tourmaline) in Matrix
Sodium Iron Aluminum Borosilicate Hydroxide (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Quartz-rich Diorite
Diorite (Phaneritic intermediate igneous rock)
igneous
Sandstone
Arenite (major component SiO2)
sedimentary
Bornite
Bornite (Cu5FeS4)
mineral
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Uncertain small pale mineral fragment
Indeterminate; possibly calcite or a light-colored feldspar fragment
mineral
Sandstone and Quartzite Specimens
SiO2 with varying mineral/clastic inclusions
sedimentary/metamorphic
Granite (Giallo Ornamental / Venetian Gold)
Granite (composed mainly of Quartz, Feldspar, Biotite, and Garnet)
igneous
Petrified Wood
Silicified Wood (SiO2)
fossil
Quartz with Pyrite and Iron Staining
Silicon Dioxide (SiO2) with Iron Disulfide (FeS2) inclusions
mineral
Red Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5) with Red Dye
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Talc
Talc (Hydrated magnesium silicate, Mg3Si4O10(OH)2)
metamorphic
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Fluorite on Host Rock
Calcium Fluoride (CaF2)
mineral
Chrysoprase
Nickel-bearing Chalcedony (SiO2 with inclusions of Ni-compounds like kerolite or pimelite)
mineral
Gneiss
Gneiss
metamorphic
Red Sandstone
Arenite (high iron oxide content)
sedimentary
Amygdaloidal Basalt with Agate/Zeolite Amygdules
Basalt (extrusive igneous rock) containing secondary mineral fillings
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sunstone
Feldspar group (Plagioclase / Oligoclase)
mineral