Plume Agate or Moss Agate
Agate (SiO2)
mineral
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
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Sandstone
Arenite (Secondary classification based on grain size)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Chalcedony (Agate/Jasper mix)
Cryptocrystalline Sillimanite (Quartz) - SiO2
mineral
Aragonite (specifically Mexican Marbled Onyx)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Rhodonite Tumbled Chips
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Sandstone
Arenite
sedimentary
Cherry Quartz with Rose Quartz
Crystalline Quartz (SiO2) with glass-based synthetic components
gemstone
Sandstone
Arenite (SiO2-rich)
sedimentary
Marble
Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)
metamorphic
Pyrite Concretion (Grapestone)
Iron Sulfide (FeS2) Concretion
sedimentary
Tumbled serpentine (likely bowenite)
Serpentine-group magnesium silicate; commonly antigorite, lizardite, or chrysotile (Mg₃Si₂O₅(OH)₄)
mineral
Gold Nugget
Native Gold (Au)
mineral
N/A (The provided image is a storyboard/digital document)
N/A
Gold Nugget
Gold (Au)
mineral
Gold Nugget
Gold (Au)
mineral
Dalmatian jasper
Porphyritic microcrystalline quartz-rich rock, commonly sold as Dalmatian jasper; spots are chiefly arfvedsonite/amphibole minerals, sometimes altered feldspar
igneous
Green Gneiss or Greenschist
Chlorite/Actinolite Gneiss or Schist
metamorphic
Bronzite
Enstatite (magnesium iron silicate), (Mg,Fe2+)SiO3
mineral
Black Tourmaline (Schorl)
Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Rose quartz (likely)
Quartz, silicon dioxide (SiO₂), pink variety
mineral
Sandstone Clast
Arenite (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)
sedimentary
Green aventurine jade-style cabochon (likely dyed chalcedony or glass imitation)
Quartz/chalcedony, SiO₂; exact material is uncertain from the image
mineral
Polished gray stone, likely quartzite or river-worn granite
Tentatively quartzite (mostly microcrystalline SiO₂); exact identification is uncertain from the photograph
metamorphic
Veined Limestone
Sedimentary Calcite-Veined Rock (CaCO3)
sedimentary
Green fluorite crystal
Fluorite (calcium fluoride, CaF₂)
mineral
Milky quartz
Quartz (SiO₂)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Tumbled rose quartz (probable)
Quartz, silicon dioxide (SiO₂), rose-colored variety
mineral
Banded agate (likely quartz-rich chalcedony)
Microcrystalline quartz, SiO₂; possibly agate with a weathered iron-rich host rock
mineral
Polished black-and-golden tourmaline
Schorl–dravite tourmaline, commonly represented by black schorl over brown dravite
mineral
Weathered conglomeratic river cobble
Polymictic conglomerate or breccia, likely matrix-supported
sedimentary
Conglomerate
Clastic sedimentary rock (Puddingstone)
sedimentary
Sandstone (Weathered)
Arenite (primarily SiO2)
sedimentary
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Possibly red jasper or chalcedony
Microcrystalline quartz (SiO₂), possibly iron-oxide-stained chalcedony
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Gold Nugget
Native Gold (Au)
mineral
Chondrite Meteorite
Ordinary Chondrite (L or H Type)
Mineral