Amphibolite
Amphibolite
metamorphic
Category
Metamorphic Or Sedimentary Depending On Local Grade
Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.
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Gastropod Fossil (Snail Stone or Steinkern)
Class Gastropoda (Calcium Carbonate - CaCO3 / Silica - SiO2 replacing original shell)
sedimentary
Mixed Mineral and Fossil Collection
Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Puddingstone (Conglomerate)
Conglomerate (clastic sedimentary rock)
sedimentary
Gneiss
High-grade regional metamorphic rock (Foliated)
metamorphic
Seraphinite
Clinochlore (a variety of the chlorite group)
mineral
Quartz Mica Schist
Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)
metamorphic
Arid Sandy Loam
Arenosols / Regosols
sedimentary
Petoskey Stone (Fossilized Coral)
Hexagonaria percarinata
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Kyanite in Quartz
Al2SiO5 in SiO2
metamorphic
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Feldspathic Gneiss (Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Chert (Jasper)
Cryptocrystalline Silica (SiO2)
sedimentary
Ferruginous Sandstone (Ironstone)
Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)
sedimentary
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Kyanite
Kyanite (Al2SiO5)
Mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Gneiss (River Cobble)
Metamorphic Gneiss
metamorphic
Gneiss (Augen Gneiss)
Augen Gneiss
metamorphic
Garnet in Schist
Almandine Garnet in Mica-Schist (Fe3Al2(SiO4)3)
metamorphic
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Metamorphic Rock
Concretion
Siderite or Ironstone Concretion
sedimentary
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Mica Schist (Garnetiferous)
Garnet-Mica Schist
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Corundum
Corundum (Al2O3)
Mineral
Gneiss
Foliated Metamorphic Gneiss
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Kyanite (Blue Kyanite)
Kyanite (Al2SiO5)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a geode
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss (Green Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic