Slate
Foliated Metamorphic Rock (primarily clay minerals and micas)
metamorphic
Category
Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)
Browse metamorphic rock (for nephrite and some jadeite); mineral (for jadeite) specimens identified by the Rock Identifier community.
Peridot (Olivine)
Olivine ((Mg,Fe)2SiO4)
Mineral
Quartzite (specifically Milky Quartz variety)
Quartz (SiO2)
metamorphic
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Mineral
Gneiss (High-grade Metamorphic Rock)
Gneiss (Metamorphic silicate rock)
metamorphic
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2
mineral
Marble (Carrara style)
Recrystallized Calcite-rich Metamorphic Rock (CaCO3)
metamorphic
Limonite-stained Quartz
Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide (FeO(OH)·nH2O) staining
mineral
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Tiger's Eye (Inlaid in a band)
SiO2 (Silicon Dioxide with Crocidolite inclusions)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Pyrite in Shale
Iron Sulfide (FeS2)
mineral
Quartz vein in metamorphic rock
Crystalline Silicon Dioxide (SiO2) in Host Rock
metamorphic
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz grains)
sedimentary
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Basalt (River Rock/Cobble)
Basalt (no specific mineral formula as it's a rock)
Igneous
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz / Quartzite)
Silicon Dioxide (SiO2)
mineral
Pink Tourmaline (Rubellite)
Elbaite (Tourmaline group) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Quartz (Milky/Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Grey Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Red Aventurine
Aventurine Quartz (SiO2 + Hematite/Goethite)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Granite
Phaneritic Felsic Igneous Rock (primarily Quartz, Alkali Feldspar, and Plagioclase)
igneous
Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Quartzite with Hematite
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)
metamorphic
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Quartz (Milky/Crystal Variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz (or Iron-Stained Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst
Quartz (SiO2) variety
Mineral
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Nuummite
Nuummite (ortho-amphibole rock)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Yellow Quartzite Pebble
Quartzite (primarily Silicon Dioxide - SiO2)
metamorphic
Biotite Schist with Garnet
Garnet-Biotite Schist
metamorphic
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Mineral (variety of Chalcedony/Quartz)