Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Category
Mineral With Metamorphic Or Sedimentary Host
Browse mineral with metamorphic or sedimentary host specimens identified by the Rock Identifier community.
Learn about Mineral With Metamorphic Or Sedimentary Host in the encyclopedia
View all →
Chalcedony Nodule (Agate/Chert)
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
mineral
Milky quartz with iron-oxide staining and matrix
Quartz, silicon dioxide (SiO₂), likely massive quartz
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Milky quartz (likely quartz-rich rock)
Quartz, silicon dioxide (SiO₂)
mineral
Druzy Quartz on Ironstone
Silicon Dioxide (SiO2) on Limonitic Ironstone
mineral
Septarian Nodule
Septarian Nodule (Mixture of Calcite, Aragonite, and Limestone/Clay)
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Gossan (with Limonite/Hematite coating)
Ferruginous Gossan (Fe2O3·nH2O / Fe2O3)
sedimentary
Iron-stained Quartz (with Limonite/Hematite)
Silicon Dioxide (SiO2) with Iron Oxide inclusions (FeO(OH) or Fe2O3)
Mineral
Wishing Stone (Basalt with Quartz Vein)
Basalt containing a microcrystalline quartz (SiO2) or calcite vein
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
gemstone
Banded Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Milky Quartz Geode or Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Weathered iron-rich rock or concretion
Likely limonite/goethite-bearing concretion; exact identification requires testing
sedimentary
Jasper with Quartz Veins
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone Concretion
Ferruginous Sandstone Concretion (SiO2 + FeO(OH))
sedimentary
Quartzite Pebble with Quartz Vein
Metamorphic Sandstone (Quartzite) with Hydrothermal Quartz
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary host rock
sedimentary
Serpentinite
Serpentinite ((Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Limonite Concretion
Goethite-rich Concretion (FeO(OH))
sedimentary
Quartz-veined Sandstone Pebble
Quartzite-veined Arenite
sedimentary
Beryl (Emerald or Aquamarine in Matrix)
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Quartz Geode / Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Copper ore, likely native copper in a host rock
Native copper (Cu), possibly with cuprite/iron-oxide matrix
mineral
Biotite Mica in Host Rock
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Wishing Stone with Quartz Veins
Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)
metamorphic
Turquoise
Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O
mineral
Quartz (Iron-stained or Ferruginous)
Silicon Dioxide (SiO2)
mineral
Amethyst Geode Segment
Silicon Dioxide (SiO2) with trace Iron impurities
mineral
Chrysotile Serpentine (Asbestos in Matrix)
Chrysotile Mg3Si2O5(OH)4
metamorphic
Clear Quartz (Druzy)
Crystalline Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Calcite Geode
Calcium Carbonate (CaCO3)
mineral
Botryoidal Chalcedony / Quartz
Silicon Dioxide (SiO2)
mineral
Jasper and Epidote Breccia
Silicified Brecciated Rock with Epidote
metamorphic
Green Aventurine in Host Rock
SiO2 (Quartz with Fuchsite inclusions)
mineral