Copper Composite Turquoise (Purple and Blue)
Composite Hydrous copper aluminum phosphate with bronze/copper matrix binding
gemstone
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
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Marble (Sculpted Statue)
Metamorphic Limestone (composed primarily of Calcite, CaCO3)
metamorphic
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
mineral
Black Kyanite
Aluminum Silicate (Al2SiO5)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Sea Shell Fragment (Calcium Carbonate)
Aragonite / Calcite (CaCO3)
mineral
Pink Zebra Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Polished turquoise matrix beads
Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, with host-rock matrix; exact identification is uncertain from the image
gemstone
Quartz Sand Grain
Silicon Dioxide (SiO2)
sedimentary
Tiger Iron
Composite rock (Quartz, Tiger's Eye, Hematite, and Jasper)
metamorphic
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Mica Schist
Metamorphic Schist
metamorphic
Chalk
Microcrystalline calcite (CaCO3)
sedimentary
Sandstone (Red Sandstone)
Arenite
sedimentary
Porcelain (Stoneware Ceramic)
Mullite / Silica-glass composite (Al6Si2O13)
metamorphic (man-made)
Chrysocolla Cuprite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) and Cu2O (Cuprite)
mineral composite
Limestone
CaCO3 (principally Calcite)
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Ocean Jasper
Spherulitic Chalcedony (SiO2)
sedimentary
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Sandstone
Arenite (SiO2 primarily)
sedimentary
Seven Chakra Bonded Stone
Bonded composite of Red Jasper, Carnelian, Tiger's Eye, Aventurine, Lapis Lazuli, Amethyst, and Clear Quartz
metamorphic
Bauxite
Bauxite (Al(OH)3, AlO(OH), AlOOH)
sedimentary
Unakite
Epidotized Granite
metamorphic
Polished turquoise sphere with purple matrix/inclusion
Turquoise, hydrated copper–aluminum phosphate; approximate formula CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Quartz with Iron Oxide
SiO2
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
River Pebble (Granitic / Quartzite Pebble)
Quartz-Feldspar Aggregate (SiO2 / KAlSi3O8)
igneous
Sandstone (Ferruginous)
Arenite with Iron Oxides
sedimentary
Agate
Silicon dioxide (Chalcedony), SiO2
gemstone
Ruby zoisite (anyolite)
Zoisite with corundum (ruby) and commonly amphibole; Ca₂Al₃(SiO₄)₃(OH)
metamorphic
Red Sandstone
Ferruginous Sandstone (SiO2 + Fe2O3)
sedimentary
Decorative gemstone-chip jewelry (likely turquoise, coral, and assorted beads)
Predominantly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; other pieces appear to be dyed coral or red stone, and possibly shell/metal components
gemstone
Sandstone
Arenite (SiO2 based)
sedimentary
Engineered Quartz Stone
Agglomerated Quartz (SiO2 + Polymer Resin)
mineral-based composite
Brick
Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)
Man-made material (constructed)
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Red Garnet (likely Almandine or Pyrope)
Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Anthracite Coal
Anthracite coal (High-rank coal)
sedimentary
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary