Quartz Vein in Host Rock (Gabbro or Basalt)
Silicon Dioxide (SiO2) with Mafic Silicates
metamorphic/igneous
Category
Metamorphic Rock (For Both Nephrite And Jadeite)
Browse metamorphic rock (for both nephrite and jadeite) specimens identified by the Rock Identifier community.
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Quartz (various varieties)
SiO₂ (Silicon Dioxide)
Mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
River Rock (likely Quartzite or Quartz-rich Siltstone)
Quartzite (SiO2)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Rock Crystal)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Pink Granite / Gneiss
Felsic Plutonic Rock (Granite) with Gneissic banding
igneous / metamorphic
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Quartz Vein in Host Rock (Pebble)
Quartz (SiO2) with sandstone or siltstone matrix
metamorphic/igneous transition
White Quartz
Quartz (SiO2)
Mineral
Quartzite
Quartzite
Metamorphic rock
Aventurine (likely Green Aventurine)
Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)
Mineral/Metamorphic Rock
Muscovite Mica
Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2
Mineral
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
mineral
Labradorite
Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)
Mineral
River Cobble (likely Quartzite or Limestone)
SiO2 (Quartzite dominant) or CaCO3 (Limestone dominant)
metamorphic or sedimentary
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Blue Tiger's Eye
Crocidolite in Quartz (altered)
Mineral
Quartz
Silicon Dioxide (SiO₂)
Mineral
Granite
Granite (a felsic intrusive igneous rock)
Igneous
Quartz (pebble)
Quartz (SiO₂)
Mineral
River Stone (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) based metamorphosed sandstone
metamorphic or sedimentary
Sandstone, Quartzite, and River Pebbles
Silicon Dioxide (SiO2) based Sedimentary/Metamorphic structures
Sedimentary and Metamorphic
Lapis Lazuli
Lazurite-rich metamorphic rock; (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Lapis Lazuli (prominent blue specimen in collection)
Lazurite-rich metamorphic rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2
metamorphic
Dendritic Agate
Silicon Dioxide with Manganese or Iron Oxide inclusions (SiO2 + Mn/Fe)
mineral
Gneiss
Gneiss (pronounced 'nice')
Metamorphic Rock
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Mineral
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Mineral
Banded Gneiss
Gneiss (pronounced 'nice')
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Metamorphic Rock (variety of Quartz)
Greisen (Quartz-Muscovite-Turretine Rock)
Greisen
Metamorphic Rock
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Mineral
Quartz / Quartzite
Silicon Dioxide (SiO2)
Mineral / Metamorphic
Quartz (likely a weathered/tumbled piece)
Quartz (SiO₂)
Mineral
Garnet (Almandine or Spessartine likely)
Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)
Mineral
Jasper Agate
Silicon dioxide (SiO2)
mineral
Green Aventurine (likely)
Silicon dioxide (SiO2) with fuchsitemica inclusions
Mineral (specifically a variety of Quartz)