Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)
mineral
Category
Sedimentary (Secondary Mineral) Within Igneous
Browse sedimentary (secondary mineral) within igneous specimens identified by the Rock Identifier community.
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
sedimentary
Orthoclase Feldspar (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)
mineral
Clear Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
mineral
Amethyst
Silicon dioxide with iron impurities (SiO2)
mineral
Amazonite
Potassium Feldspar (KAlSi3O8)
mineral
Chert (Jasper/Chalcedony variety)
Silicon Dioxide (SiO2)
sedimentary
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
igneous
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Quartz
Quartz (SiO₂)
Mineral
Quartz (Translucent/Rose variety)
Silicon Dioxide (SiO2)
mineral
Banded Agate (specifically Botryoidal/Orbicular Agate)
Silicon Dioxide (SiO2)
Mineral (variety of Chalcedony/Quartz)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Blue Lace Agate (Geode/Druzy variant)
Chalcedony (SiO2) with Quartz druzy
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper with Quartz Vein
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Sapphire
Corundum (Al2O3 - Aluminum Oxide)
mineral
Quartz-veined Basalt
Amygdaloidal or Porphyritic Basalt with Silicon Dioxide (SiO2) vein
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Agate Geode Slice (with Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Pegmatite (Granite Pegmatite)
Intrusive Igneous Rock (Granite Pegmatite)
igneous
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Magnetite Orthorthotropic Rock
Magnetite (Fe3O4)
mineral
Eudialyte
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Ironstone Concretion (Nutstone)
Ironstone (with High Limonite/Hematite Content)
sedimentary
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz and Orthoclase Feldspar
Granitic Pegmatite (SiO2 + KAlSi3O8)
igneous