Granite or Granitic Gneiss
Granitoid / Gneiss
Igneous / Metamorphic
Category
Mixed
Browse mixed specimens identified by the Rock Identifier community.
Gravel or Crushed Stone
Fragmented Aggregate Stone
sedimentary or igneous fragment
Quartz with Mica inclusions (Pegmatite)
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
igneous
Mixed Gemstone Collection
SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)
mineral
Granite or Pegmatite with Quartz and Feldspar
Granitoid
igneous
Tiffany Stone
Fluorite-bearing Opalized Breccia
Rock/Mineralized Nodule
Caribbean Calcite
Calcite (CaCO3) with Aragonite (CaCO3)
mineral
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Asphalt Concrete
Bituminous conglomerate
sedimentary
Milky Quartz with Nephrite Jade
Silicon Dioxide (SiO2) with Ca2(Mg,Fe)5Si8O22(OH)2
mineral/metamorphic
Jasper containing Agate (Jaspagate)
Silicon Dioxide (SiO2)
sedimentary
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions (SiO2 + Fe2O3)
igneous
Engineered Quartz Stone
Agglomerated Quartz (SiO2 + Polymer Resin)
mineral-based composite
Dragon Blood Jasper
Epidote with Red Jasper (Quartz-rich aggregate)
sedimentary
Puddingstone
Conglomerate
Sedimentary
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
Unakite
Epidotized Granite
metamorphic
Granite Pebble
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Unakite
Unakite (altered granite)
metamorphic
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)
BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel
mineral
Mixed Gemstone and Mineral Collection
Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2 with iron impurities)
sedimentary
Chrysocolla in Matrix
Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Sedimentary (Synthetic)
Gold Flakes
Native Gold (Au)
mineral
Concrete rubble
Anthropogenic conglomerate
sedimentary
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
not a natural rock
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Concrete Rubble with Aggregate
Hardened Portland Cement Paste with Coarse Aggregate
Anthropogenic (Man-made)
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Gravel or Pebble
Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)
sedimentary
Aventurine (Green Quartz)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Pink Granite (Gneissic Granite)
Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)
igneous
Lapis Lazuli
Lapis lazuli (complex rock composed of Lazurite, Calcite, and Pyrite)
metamorphic
Unakite
Unakite (Metasomatized Granodiorite)
metamorphic
Pink Granite
Granite (rich in Potassium Feldspar/Orthoclase)
igneous
Unakite
Epidotized Granite
metamorphic
Venetian Gold Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous