Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Category
Mixed
Browse mixed specimens identified by the Rock Identifier community.
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Caribbean Calcite
Calcite (CaCO3) with Aragonite (CaCO3)
mineral
Quartz pebble in concrete
Quartz (SiO₂), embedded in Portland-cement concrete
mineral
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Asphalt Concrete
Bituminous conglomerate
sedimentary
Azurite and Malachite
Cu3(CO3)2(OH)2 (Azurite) / Cu2CO3(OH)2 (Malachite)
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2 with iron impurities)
sedimentary
Chrysocolla in Matrix
Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Jasper containing Agate (Jaspagate)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz with Nephrite Jade
Silicon Dioxide (SiO2) with Ca2(Mg,Fe)5Si8O22(OH)2
mineral/metamorphic
Feldspar-Quartz Rock (likely Pegmatite or Granite)
Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)
igneous
Unakite
Unakite (altered granite)
metamorphic
Granite Pebble
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Unakite
Epidotized Granite
metamorphic
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Concrete rubble
Anthropogenic conglomerate
sedimentary
Polished carnelian jasper / brecciated jasper
Microcrystalline quartz (SiO₂), chalcedony with iron-oxide pigments and opaque jasper fragments
gemstone
Agate (Brecciated / Moss Agate with Jasproid Inclusions)
Silicon Dioxide (SiO2)
mineral
Jasper / Agate
Silicon dioxide (SiO2)
sedimentary
Jasper and Quartz
Silicon Dioxide (SiO2)
sedimentary
Glacial Cobbles (predominantly Granite and Gneiss)
Mixed lithologies (Quartz, Feldspar, Mica assemblage)
igneous and metamorphic
Malachite with Chrysocolla
Copper carbonate hydroxide (Cu2CO3(OH)2) and Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Smoky Quartz and Orthoclase Feldspar
Granitic Pegmatite (SiO2 + KAlSi3O8)
igneous
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Sedimentary (Synthetic)
Fulgarite
Fulgurite (Lechatelierite / Vitrified Sand)
igneous
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Likely rose quartz-bearing pegmatite
Quartz (SiO₂), probably with feldspar and iron-oxide staining
mineral
Connemara Marble
Calcitic Marble / Serpentinite composite
metamorphic
Gold Flakes
Native Gold (Au)
mineral
River Pebble
Polished Quartzite or Mixed Lithology
sedimentary
River Pebbles (Mixed Suite)
Mixed lithologies: Quartzite and Gneiss
metamorphic
Mixed Gemstone and Mineral Collection
Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)
mineral
Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)
BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel
mineral
Mixed Rock and Mineral Collection
Mixed Assemblage (includes Quartz, Jasper, Feldspar, and Turquoise-colored stones)
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Gravel or Pebble
Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)
sedimentary
Gravel (Crushed Stone Aggregates)
Mixed Siliciclastic / Carbonate Aggregate
sedimentary
River Pebbles and Quartz
Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)
mixed
Copper Ore (Malachite and Limonite bearing)
Cuprite, Malachite, and Limonite mixture
mineral
Sodalite
Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)
mineral