Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
Mineral Precipitate (Anthropogenic Context)
Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.
Learn about Mineral Precipitate (Anthropogenic Context) in the encyclopedia
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Ferruginous Sandstone
Arenite with limonite/goethite cement
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in a concretion
sedimentary
Gold-bearing Quartz
Auriferous Quartz (SiO2 with native Au)
mineral
Barite Rose on Marcasite
Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)
mineral
Quartz Geode
Quartz (SiO2) in a Sedimentary Vug
sedimentary
Jasper (Red Jasper)
Jasper (SiO2 - Silicon Dioxide with iron inclusions)
sedimentary
Sandstone with Ironstone Concretion
Arenite with Hematite/Goethite nodules (Fe2O3 / FeO(OH))
sedimentary
Basalt with Quartz Vein
Aphanitic Mafic Igneous Rock with Silicon Dioxide (SiO2) intrusion
igneous
Septarian Nodule (Dragon Stone)
Septarian concretion (CaCO3 with Aragonite and Calcite)
sedimentary
Iron-stained Quartz Vein
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Lake Superior Agate
Chalcedony (SiO2 with iron impurities)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Common Opal in Host Rock
Hydrated Silica (SiO2·nH2O)
mineraloid
Quartz (Iron-stained or Milky)
Silicon Dioxide (SiO2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Psilomelane (Black Hematite/Manganese Ore)
Barium Manganese Oxide (Formula: BaMn9O18(OH)4)
mineral
Orange Moss Agate / Carnelian Agate
Silicon dioxide (SiO2) - variety Chalcedony
sedimentary
Dyed Blue Agate Slice
Silicon Dioxide (SiO2)
mineral
Banded Agate
Cryptocrystalline Silica (SiO2)
mineral
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Agate (specifically Botryoidal/Orbicular Agate)
Silicon Dioxide (SiO2)
Mineral (variety of Chalcedony/Quartz)
Ferruginous Sandstone (Ironstone)
Iron-rich Arenite
sedimentary
Yellow Jasper
Chalcedony (SiO2 with iron oxide inclusions)
sedimentary
Chert with Quartz Vein
Microcrystalline Quartz (SiO2)
sedimentary
Chert on Volcanic Host Rock
Sedimentary Chert (SiO2) within Basalt or Andesite
sedimentary
Pyrite
Pyrite (FeS2)
Mineral
Amygdaloidal Basalt
Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)
igneous
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral/igneous
Orange Calcite
Calcite (Calcium Carbonate - CaCO3)
mineral
Onyx
Onyx (a variety of Chalcedony, SiO₂)
Mineral
Agate (Plume/Moss variety)
Cryptocrystalline Quartz (SiO2) with iron/manganese inclusions
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz Vein
Basalt (fine-grained mafic igneous rock) with crystalline Quartz (SiO2)
igneous
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Agate (Carnelian/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral