Amygdaloidal Basalt
Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)
Category
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Amygdaloidal Basalt
Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)
Schist with Quartz Vein
Mica Schist with Crystalline Quartz (SiO2)
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
Chert / Jasper
Microcrystalline Quartz (SiO2)
Chert (Jasper)
Silicon dioxide (SiO2)
Greenstone / Diorite
Intermediate plutonic igneous rock
Arkosic Sandstone
Arkose
Gastropod Steinkern (Fossilized Snail Cast)
Phylum Mollusca, Class Gastropoda (Commonly CaCO3 or SiO2 after replacement)
Green Calcite
Calcium Carbonate (CaCO3)
Mica Schist
Schist (Crystalline metamorphic rock)
Quartz pebble
Silicon dioxide (SiO2)
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
Sandstone with Quartz Veining
Arenite with hydrothermal quartz (SiO2)
Chert (often called Jasper in this color)
Microcrystalline quartz (SiO2)
Chert (White/Gray variety)
Chert (SiO2)
Fossiliferous Limestone with Brachiopods
Calcium Carbonate (CaCO3) with fossilized Brachiopoda sp. (likely Order Spiriferida or Rhynchonellida)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Oolite (Ooid Limestone)
Ooidal Limestone (comprised of CaCO3)
Coquina
Coquina (Bioclastic Limestone)
Crinoid Fossil Stem Segment
Class Crinoidea (Echinodermata)
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
Banded Chert
Microcrystalline silicon dioxide (SiO2)
Ferruginous Sandstone (Ironstone)
Ferruginous Sandstone / Limonite-cemented Quartz Sandstone
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Quartz (Milky or Smoky variety)
Silicon Dioxide (SiO2)
Chert (Jasper/Flint variation)
Chert (SiO2)
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Quartz on Basalt
Silicon Dioxide (SiO2) on Mafic Igneous Rock
Chert (often called Jasper or River Rock)
Chert (SiO2)
Jasper with Quartz inclusions
Silicon Dioxide (SiO2) - Microcrystalline Chalcedony
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)
Jasper / Chert (River Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Jasper with Hematite inclusions
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
Jasper (likely Lake Superior Jasper)
Jasper (Silicon Dioxide, SiO2)
Jasper (Iron-rich Microcrystalline Quartz)
Silicon Dioxide (SiO2) with Hematite inclusions
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Granite
Granite (Felsic Plutonic Rock)
Olivine (Peridot when gem-quality)
Magnesium Iron Silicate, (Mg,Fe)2SiO4
Massive Quartz with Host Rock
Silicon Dioxide (SiO2)