Banded Agate (River Stone)
Agate (Silicon Dioxide - SiO2)
mineral
Category
Sedimentary (Secondary Mineral) Within Igneous
Browse sedimentary (secondary mineral) within igneous specimens identified by the Rock Identifier community.
Learn about Sedimentary (Secondary Mineral) Within Igneous in the encyclopedia
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Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
Mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Chert Pebble with Quartz Veins
Microcrystalline Quartz (SiO2)
sedimentary
Limonite Stained Basalt
Hydrated Iron Oxide on Mafic Volcanic Rock (FeO(OH)·nH2O)
igneous
Obsidian with Cristobalite
Volcanic Glass (Amorphous Silicon Dioxide) with Cristobalite inclusions
igneous
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz with iron inclusions
Mineral
Gneiss (specifically a granitic gneiss cobble)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Yellow Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO₂)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
SiO2 (Silicon Dioxide with aluminum impurities)
mineral
Carnelian
Cryptocrystalline Quartz (SiO2)
mineral
Pink and Green Tourmaline (Tumbled)
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Biotite Schist
Biotite Schist (Metamorphic Rock featuring K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions
igneous
Granite Pebble
Granite
igneous
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Psilomelane (Black Hematite/Manganese Ore)
Barium Manganese Oxide (Formula: BaMn9O18(OH)4)
mineral
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Limonite-stained Chert
Microcrystalline Quartz (SiO2) with Goethite/Limonite (FeO(OH)·nH2O)
sedimentary
Epidote in Quartz
Quartz with Epidote inclusions (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) inclusions)
Mineral
Fossilized Wood (with Coal and Limonite)
Petrified Wood (Silicified or Carbonized Flora)
sedimentary
Banded Agate
Silicon Dioxide (SiO2)
mineral
Granitic Gneiss
Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)
metamorphic
Jasper
Silicon Dioxide (Microcrystalline Quartz / Chalcedony)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Strawberry Quartz
Quartz with Hematite or Goethite inclusions (SiO2 + inclusions)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with ferric impurities)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Basalt with Desert Varnish
Mafic Igneous Rock with Ferromanganese Coating
igneous
Basalt with vesicles/amygdules
Basalt (containing volcanic glass and plagioclase)
igneous
Carnelian
Carnelian (a variety of Chalcedony, SiO ₂)
Mineral (specifically a variety of Chalcedony, which is a cryptocrystalline quartz)
Rutilated Quartz (with Garnet pendant)
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral