Citrine
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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Hematite / Goethite (Iron Ore)
Iron Oxide (Fe2O3 / FeO(OH))
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Chert (Arrowhead Preform or Flake)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Geode with Chalcedony
Silicon Dioxide (SiO2) in Geode Form
sedimentary
Agate
Silicon dioxide (SiO2) - variety of chalcedony
sedimentary
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz Veins
Basalt (SiO2 range 45-52%)
igneous
Basalt with Quartz/Feldspar Inclusions
Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining
igneous
River Pebbles (Basalt and Graywacke/Limestone)
Mafic Volcanic Rock / Impure Sandstone
igneous and sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz/Zeolite Inclusions
Porphyritic Basalt (SiO2 with Aluminosilicates)
igneous
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Fossil-bearing Sedimentary Rock
Sedimentum cum fossili
fossil
Gneiss (Granitic Gneiss)
Gneiss
metamorphic
Sandstone (with secondary weathering/concretion)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
sedimentary
Gneiss
Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)
metamorphic
Propylitic Altered Andesite
Hydrothermally Altered Andesite
igneous
Milky Quartz
Crystalline Quartz (SiO2)
mineral
Agate (Common Chalcedony)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Dyed Blue Agate
Silicon Dioxide (SiO2)
Mineral
Quartz (Chert/Chalcedony Variety)
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite (with Pyrite)
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Polished basalt (vesicular basalt pebble)
Basalt, primarily plagioclase feldspar and pyroxene, commonly with olivine and iron oxides
igneous
Limonite (Iron Ore)
Hydrated ferric oxide (FeO(OH)·nH2O)
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Geode (unopened)
Calcedony-lined Geode (SiO2)
sedimentary
Druzy Quartz on Limestone
Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)
sedimentary
Granitic Gneiss
Gneiss (Complex silicate composition)
metamorphic
Porphyritic Basalt (with Amygdales)
Amygdaloidal Porphyritic Basalt
igneous
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Dalmation Jasper
Aplite with Arfvedsonite inclusions (SiO2 with Na3(Mg,Fe2+)4AlSi8O22(OH)2)
igneous
Basalt with Quartz/Calcite Inclusions
Mafic Volcanic Rock (Fe-Mg silicate rich)
igneous
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Granite Pebble
Granite (Felsic Plutonic Rock)
igneous
Banded Agate (with possible Chalcedony layers)
Silicon dioxide (SiO2)
sedimentary