Chrysocolla on Quartz/Rhyolite matrix
Hydrated copper phyllosilicate mineral: (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Category
Mineral Description (Anthropogenic Material)
Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.
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Banded Agate
Agate (chalcedony variety of Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled banded sandstone pebble
Quartz-rich sandstone (chiefly SiO₂), likely iron-oxide-stained
sedimentary
Sandstone
Arenite (primarily SiO2 with various cementing agents)
sedimentary
Bumblebee Jasper
Fibrous Calcite and Quartz with Volcanic Matter (CaCO3 / SiO2)
mineral
Aquamarine (Small Beads)
Beryl (Be3Al2Si6O18 with traces of iron)
gemstone
Breccia Pebble
Sedimentary Breccia
sedimentary
Siltstone with Quartz Vein
Siltstone (primarily SiO2, Al2O3, Fe2O3)
sedimentary
Flint
Microcrystalline Quartz (SiO2)
sedimentary
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Chert Nodules
Microcrystalline Quartz (SiO2)
sedimentary
Soapstone (Steatite)
Steatite (primarily Talc: Mg3Si4O10(OH)2)
metamorphic
Polished banded agate
Chalcedony (microcrystalline quartz), SiO₂
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Biotite (Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Likely quartz-rich metamorphic rock (quartzite or quartz-veined schist)
Quartzite/siliceous schist; chiefly quartz (SiO₂), with probable mica and iron-oxide staining
metamorphic
Diamond (set in Gold)
Diamond (pure carbon, C)
mineral
Jasper (Brown Iron-Rich Variety)
Silicon Dioxide (SiO2) with Fe2O3 (Iron Oxide/Crystalline Quartz)
sedimentary
Green beryl (likely aquamarine-grade beryl)
Beryl, Be₃Al₂Si₆O₁₈; blue-green color is caused mainly by iron
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Diorite (River Cobble)
Intermediate plutonic igneous rock
igneous
Polished/patinated jasper slab
Microcrystalline quartz (SiO₂), commonly chalcedony with iron-oxide and clay inclusions
sedimentary
Chalcedony on Ironstone
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3/FeOOH)
sedimentary
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Chert (Flinty variety)
Microcrystalline Quartz (SiO2)
sedimentary
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite and Calcite/Aragonite infusions)
sedimentary
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Ocellar Rhyolite
Rhyolite (featuring orbicular/ocellar quartz and feldspar textures)
igneous
Small rounded pebble, likely quartz-rich stone
Indeterminate from photograph; possibly microcrystalline quartz (SiO₂) or a weathered silicate pebble
mineral
Iron-stained quartz crystal
Quartz (SiO₂), likely iron-oxide-coated or included
mineral
Tumbled pink quartz (likely rose quartz)
Quartz, silicon dioxide (SiO₂), pink variety commonly called rose quartz
mineral
Blue Lace Agate
Silicon Dioxide (SiO₂), a variety of Chalcedony
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Botryoidal Malachite
Malachite - Cu2CO3(OH)2
mineral