Basalt
Basalt (extrusive igneous rock)
Igneous
Category
Mineral Or Sedimentary Rock (With Mineral Inclusions)
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
Blue Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)
Mineral
Ironstone Concretion (Ironstone Gourd)
Limonite/Goethite Concretion (FeOO(H))
sedimentary
Basalt (Greenstone)
Amygdaloidal Basalt / Chloritized Basalt
Igneous
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Jasper
Jasper (Silica/Quartz) - SiO2
sedimentary
Granite
Granite (a felsic intrusive igneous rock)
Igneous Rock
Yellow Quartz (Chalcedony/Agate)
Silicon Dioxide (SiO2)
Mineral
Yellow Jasper
Tectosilicates (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Calcite (Yellow/Orange variety - sometimes called Honey Calcite)
Calcite
Mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Arkosic)
Arenite (SiO2 with KAlSi3O8)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Banded Agate (with small Geode cavity)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Biotite (Mica)
Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Red Sandstone
Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)
sedimentary
Jasper
Silicon Dioxide (SiO2)
mineral
Amber with inclusion
Amber (Fossilized Tree Resin)
mineral
Chert (Flint)
Chert (predominantly SiO₂ - silicon dioxide)
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a nodule
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Fancy Jasper
Chalcedony (cryptocrystalline quartz) with inclusions
Mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary/mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Jasper (likely Polychrome or Mookaite variants)
Silicon Dioxide (SiO2) with iron oxide and hydroxide inclusions
sedimentary (chemically precipitated)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Rough Amber (likely Copal or immature Amber)
Organic gemstone / Succinite (if Baltic)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
sedimentary
Glauconitic Sandstone
Glauconitic Sandstone (contains (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2 inclusions)
mineral
Fossiliferous Sandstone (with Brachiopod or Bivalve mold)
Clastic Sedimentary Rock with Macrofossil Mold
sedimentary
Basalt
Basalt
igneous
Turquoise
Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Aventurine (Tan/Cream colored)
Quartz (SiO2) with mineral inclusions
mineral
Druzy Quartz on Limestone
Silicon Dioxide (SiO2)
mineral
Yellow Quartzite or Yellow Jasper
Quartzite (primarily SiO2 with Iron oxide staining)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Picture Jasper
Silicon Dioxide (SiO2) - Opaque Impure Chalcedony
sedimentary