Carnelian
Carnelian (Cryptocrystalline Quartz, 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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Pink Dyed Agate
Silicon Dioxide (SiO2) with synthetic pigment
mineral
Satin Spar
Fibrous Gypsum (CaSO4·2H2O)
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Celestite (Celestine)
Celestine (Strontium Sulfate, SrSO4)
Mineral
Yellow Quartz (Citrine Quartz variety / Ferruginous Quartz)
Silicon Dioxide (SiO2) with iron inclusions
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Ruby (Corundum)
Al2O3 (Aluminium oxide with Chromium impurities)
Mineral
Blue Sapphire
Corundum (Al2O3 - Aluminum Oxide)
mineral
Gneiss
Gneiss
metamorphic
Druzy Chalcedony (Agate Geode)
Silica (SiO2) - Cryptocrystalline Quartz with druzy macrocrystalline quartz
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Agate (or Chalcedony)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Jasper
Cryptocrystalline Quartz (SiO2)
sedimentary
Banded Gneiss
Gneiss
metamorphic
Dalmatian Stone
Dalmatian Stone (a peralkaline igneous rock consisting of Feldspar, Quartz, and Arfvedsonite)
igneous
Turquoise
Turquoise (Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O)
Mineral
Limonitic Iron Ore / Goethite
Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)
sedimentary
Quartz Druze on Matrix (Geode Fragment)
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian
Carnelian (SiO2, Silicon Dioxide with Iron Oxide impurities)
mineral
Basalt with Quartz/Calcite Veins
Aphanitic Mafic Igneous Rock with Hydrothermal Veining
igneous
Porphyritic Basalt (with Amygdules)
Amygdaloidal Porphyritic Basalt
igneous
Siltstone with Fossil Cast
Sedimentary Rock (Siltstone / Fine-grained Sandstone)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Gneiss (Granitic Gneiss)
Gneiss (from German Gneis, related to 'spark')
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate (specifically Lake Superior Agate type)
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Limonite/Ironstone
Limonite (Hydrous ferric oxides), FeO(OH)·nH2O
sedimentary
Dalmation Stone
Peralkaline rhyolite (SiO2 with Arfvedsonite/Riebeckite)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Host rock) with Quartz or Calcite amygdules
igneous
Schist
Mica Schist (Variable chemistry, often rich in muscovite and biotite)
metamorphic
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Banded Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Limonite
FeO(OH)·nH2O (Hydrated iron oxide)
mineral
Basalt River Stone with Mineral Crust
Aphanitic Mafic Igneous Rock
igneous
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
K2 Jasper (Beads)
Granodiorite with Azurite and Malachite
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral