Gold Nugget
Native Gold (Au)
mineral
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
Learn about Mineral Based Composite in the encyclopedia
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Gold Nugget
Native Gold (Au)
mineral
Gold
Gold (Au)
mineral
Gold Nugget
Gold (Au)
mineral
Gold
Gold (Au)
mineral
Gold
Native Gold (Au)
mineral
Banded agate (agate nodule slice)
Agate, a banded variety of microcrystalline quartz; SiO₂
mineral
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)
metamorphic
Dalmatian Jasper
Peralkaline Quartz-Feldspar Igneous Rock with Arfvedsonite
igneous
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Rose Quartz
Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese
mineral
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Limestone or Sandstone Cobble
Sedimentary rock (Calcium carbonate or Quartz based)
sedimentary
Chevron amethyst point
Quartz, SiO₂, with purple amethyst and white quartz zoning
gemstone
Mica Schist
Mica Schist
metamorphic
Banded Calcite (often sold as 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Milky quartz
Quartz (SiO₂)
mineral
Unidentified dark reddish-brown rock or mineral specimen
Indeterminate from the blurred image; possibly iron-stained quartz, jasper, or a metallic sulfide-bearing rock
mineral
Charoite
Charoite (K(Ca,Na)2Si4O10(OH,F)·H2O)
mineral
Clear quartz crystal (likely quartz point/fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Red Garnet
Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)
Mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Red Sandstone
Arenite
sedimentary
Copper-bearing volcanic breccia
Altered andesite or rhyolite breccia with secondary copper minerals, likely chrysocolla and/or malachite
igneous
Chrysocolla Cuprite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) and Cu2O (Cuprite)
mineral composite
Iron-rich rock fragment (tentative)
Unidentified iron oxide/hydroxide-rich material; possible hematite or goethite
mineral
Magnetite-rich iron ore
Magnetite (Fe₃O₄), possibly massive magnetite/ironstone
mineral
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)
sedimentary
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Red Sandstone
Arenite (predominantly Quartz with Hematite cementation)
sedimentary
Likely selenite (transparent gypsum) crystal cluster
Gypsum, CaSO₄·2H₂O; selenite is its clear crystalline variety
mineral
Weathered concrete or cementitious slab (not natural rock)
Artificial calcium-silicate cement composite; likely Portland cement concrete
sedimentary
Limonite (Bog Iron)
Limonite (Hydrated iron(III) oxide-hydroxide) - FeO(OH)·nH2O
mineral
Fluorite (Green Fluorite on Host Rock)
Fluorite (Calcium Fluoride, CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone
Arenite
sedimentary
Sedimentary Breccia
Clastic Breccia (CaCO3/SiO2 matrix)
sedimentary
Chrysocolla-bearing copper ore
Chrysocolla (hydrated copper phyllosilicate; commonly approximated Cu₂H₂Si₂O₅(OH)₄·nH₂O), with possible malachite/limonite matrix
mineral
Granite
Felsic intrusive igneous rock
igneous
Milky Quartz with Hematite inclusions
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary