Dalmatian Stone
Dalmatian Stone (a variety of aplite)
igneous
Category
Mineral Within Sedimentary Rock
Browse mineral within sedimentary rock specimens identified by the Rock Identifier community.
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Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Gneiss
Gneiss
metamorphic
Chalcedony in Host Rock
Chalcedony (SiO2)
mineral
Native Copper within Host Rock
Native Copper (Cu)
Mineral
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartz Druze on Matrix (Geode Fragment)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Vein Rock
Silicon dioxide (SiO2) within a host rock matrix
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Gneis
Gneiss (High-grade metamorphic rock)
metamorphic
Chert (Flint)
Chert (Microcrystalline or cryptocrystalline Quartz, SiO2)
sedimentary
River Stone (Basalt or Siltstone)
Mafic Volcanic Rock or Clastic Sedimentary Rock
igneous or sedimentary
Quartz Geode Cluster (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chert Nodule
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
mineral
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Green Fossilized Algae or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite (Fe2O3·nH2O) inclusions
mineral
Chert / Flint
Chert (Silicon Dioxide, SiO2)
sedimentary
Quartzite pebble with Mafic inclusions
Quartzite (SiO2)
metamorphic
Limestone with Algal/Lichen Colonization
Calcium Carbonate (CaCO3)
sedimentary
Yellow Jasper (Chert)
Silicon Dioxide (SiO2) with Iron Oxide impurities
mineral
Dalmatian Stone
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Polished gneiss or migmatitic gneiss cobble
Banded quartz–feldspar–biotite gneiss; compositionally possibly migmatitic
metamorphic
Ironstone Concretion (Moqui Marble)
Iron Oxide Concretion (Fe2O3 / FeO(OH) mixed with SiO2)
sedimentary
Sandstone with Hematite staining
Arenite with Fe2O3 inclusions
sedimentary
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Ironstone Concretion / Goethite Nodules
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (Metamorphic rock)
metamorphic
Bivalve Fossil (Shell-bearing Sedimentary Rock)
Class Bivalvia (Phylum Mollusca) within a Calcarenite/Sandstone matrix
fossil
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Yellow Ocherous Siltstone (Limonitic Shale)
Limonitic Siltstone / Goethite-rich Sedimentary Rock
sedimentary
Ferruginous Sandstone (Gozzan)
Iron-rich clastic sedimentary rock with Limonite/Goethite
sedimentary
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Metamorphic, likely Sedimentary with Quartz veins
Garnet Schist
Almandine-Muscovite Schist
metamorphic
Amethyst
Quartz (Silicon Dioxide with iron impurities), SiO2
mineral