Druzy Quartz (on Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Secondary Mineral) Within Igneous
Browse sedimentary (secondary mineral) within igneous specimens identified by the Rock Identifier community.
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Labradorite (a variety of Feldspar)
Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)
igneous
Vesicular Basalt with Calcification
Vesicular Basalt (Aphanitic extrusive igneous rock)
igneous
Carnelian (Tumbled Chalcedony)
Silicon Dioxide (SiO2)
gemstone
Native Copper
Native Copper (Cu)
mineral
Banded River Cobble with Mafic Dike
Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion
igneous and sedimentary
Quartz (Smoky/Rose Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Sandstone (Ferruginous)
Clastic sedimentary rock (SiO2 with Fe2O3)
sedimentary
Quartz (likely Chalcedony or Chert)
Silicon Dioxide (SiO2)
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic rock (Gneiss)
metamorphic
Quartz Geode (River Cobble)
Silicon Dioxide (SiO2)
mineral
Granite Gneiss
High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)
metamorphic
Chalcedony or Chert/Jasper with secondary mineral staining
SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.
Mineral, potentially a rock with chalcedony/jasper.
Veined Limestone (Micrite) with Quartz/Calcite Veins
Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions
sedimentary
Chert with Calcite Veining
Microcrystalline Quartz (SiO2) with Calcium Carbonate (CaCO3) veins
sedimentary
Limonite (Iron Ore)
Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)
mineral
Diamond (Cut Specimen)
Carbon (C)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a sedimentary or igneous host
sedimentary
Red Jasper (Tumbled)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary/mineral
Quartz Vein in Sedimentary Rock
Silicon Dioxide (SiO2) with host Chert or Limestone
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Milky Quartz (Crystal Cluster)
Silicon Dioxide (SiO2) - Quartz Variety
mineral
Quartz (likely tumbled or naturally water-worn)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Blue Sapphire
Corundum (Al2O3)
mineral
Yellow Quartz (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Rose Quartz with possible Manganese or Iron inclusions
SiO2 (Silicon Dioxide)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
River Cobble (Diorite or Meta-volcanic with Quartz Veining)
Diorite (with SiO2 quartz veins)
igneous
Gneiss Pebble
Gneiss
metamorphic
![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral](https://media.rockidentification.com/92ebc6b5-08ac-4229-a727-57a096ec7f2c-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
mineral
Garnet-Bearing Gneiss
Almandine-Garnet Gneiss
metamorphic
Basalt with Calcite Veining
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Chalcopyrite in Quartz matrix
Chalcopyrite (CuFeS2) with secondary Malachite (Cu2CO3(OH)2)
mineral
Basalt with Iron Oxidation
Mafic Igneous Basalt
igneous
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Yellow Quartz (Iron-stained Quartz)
Quartz (Silicon Dioxide, SiO2) with Hematite/Limonite impurities
mineral