Goniatite Fossil
Order Goniatitida
fossil
Category
Mineral Group
Browse mineral group specimens identified by the Rock Identifier community.
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Fossilized Crinoid Stem Segment
Crinoid (Phylum Echinodermata, Class Crinoidea)
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Bivalve Fossil (Clam)
Class Bivalvia, likely Mercenaria or similar genus
fossil
Garnet Gneiss or Mica Schist with Garnet
Almandine Garnet-bearing Gneiss
metamorphic
Labradorite
Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8
mineral
Gastropod Fossil (Snail Stone or Steinkern)
Class Gastropoda (Calcium Carbonate - CaCO3 / Silica - SiO2 replacing original shell)
sedimentary
Sunstone
Feldspar group (Oligoclase / Labradorite)
gemstone
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Peach Moonstone
Feldspar (KAlSi3O8) with inclusions
mineral
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral
Heulandite with Stilbite
Heulandite-Ca ((Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O) and Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)
mineral
Black Tourmaline
Schorl (Sodium iron aluminum boron silicate hydroxide)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Jasper Agate
Silicon dioxide (SiO2)
mineral
Tumbled Dalmatian jasper
Quartz-rich alkali rhyolite, commonly marketed as Dalmatian jasper; chiefly quartz, feldspar, and dark amphibole/biotite inclusions
igneous
Fossilized Bivalve in Limestone
Class Bivalvia within Sedimentary Matrix (likely CaCO3)
fossil
Serpentinite
Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)
metamorphic
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate
mineral
Milky Quartz with Chlorite inclusions
Silicon Dioxide (SiO2) with Chlorite group minerals
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Feldspar (Orthoclase / Alkali Feldspar)
KAlSi3O8 (Potassium Feldspar / Orthoclase)
mineral
Kimberlite
Kimberlite (Group I or II)
igneous
Mica Sand / Vermiculite
Phyllosilicate group (typically Biotite or Muscovite)
mineral
Black Star Diopside (beads)
Diopside (CaMgSi2O6) - a member of the pyroxene group
Mineral
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(BO3)3Si6O18(OH)4)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Spinosaurid Dinosaur Tooth
Spinosaurus aegyptiacus (fossilized)
fossil
Polished tiger’s-eye
Quartz variety, chiefly fibrous quartz (SiO₂), with iron-oxide inclusions
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Sodalite
Chloric sodium aluminum silicate (Na8(Al6Si6O24)Cl2)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Garnet (likely Almandine)
Almandine - Fe3Al2(SiO4)3
mineral
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Glaucophane Schist (Blueschist)
Blueschist facies metamorphic rock
metamorphic
Gabbro
Phaneritic Basic Igneous Rock
igneous