Ocean Jasper
Orbicular Jasper/Microcrystalline Quartz (SiO2)
Category
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
Ocean Jasper
Orbicular Jasper/Microcrystalline Quartz (SiO2)
Granite
Granite (Felsic Plutonic Rock)
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite inclusions
Calcite
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based with various mineral cements)
Basalt with Quartz/Calcite Vein
Basalt (Mafic Volcanic Rock with secondary mineralization)
Jasper
Silicon dioxide (SiO2)
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
Breciated Chert
Brecciated Chert (Microcrystalline Quartz, SiO2)
Native Copper
Native Copper (Cu)
Quartz (Chert/Quartzite variant)
Silicon Dioxide (SiO2)
Quartz Pebble (Iron-Stained)
Silicon Dioxide (SiO2)
Porphyritic Basalt (with Pyrolusite or Iron-oxide staining)
Porphyritic Basalt (Mafic Extrusive)
Limonite-stained Quartzite
Quartzite with Limonite (FeO(OH)·nH2O) staining
Granite Cobble
Granite (Phaneritic Quartz-Feldspar Felsic Rock)
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Quartz pebble
Silicon Dioxide (SiO2)
Sandstone (likely Ferruginous)
Arenite (SiO2 with iron oxide impurities)
Ironstone Concretion
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
Limonite (Iron Ore)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Gold Nugget
Native Gold (Au)
Limonite (Ochreous)
FeO(OH)·nH2O (Hydrated Iron Oxide)
Granite Cobble
Phaneritic Felsic Igneous Rock
Chalcedony (Common Opal variant)
Silicon dioxide (SiO2) with varying levels of hydration
Graywacke with Quartz Vein
Lithic Sandstone (Graywacke)
Ironstone Concretion
Ironstone (Limonite/Goethite Concretion)
Fluorite
Calcium Fluoride (CaF2)
Chert (specifically Iron-stained River Cobble)
Silicon Dioxide (SiO2)
Granite Pebble
Felsic Plutonic Rock (primarily Quartz, Feldspar, and Mica)
Basalt with Jasper Veining
Basaltic Rock with Cryptocrystalline Quartz (SiO2)
Smoky Quartz
Smoky Quartz (SiO2)
Diorite with Weathering Rind
Course-grained intermediate plutonic rock (Diorite)
Porphyritic Basalt (with Amygdules)
Amygdaloidal Porphyritic Basalt
Diorite (River Pebble)
Diorite
Sandstone (likely Arkosic)
Arenite (SiO2 based)
Amygdaloidal Basalt
Amygdaloidal Basalt
Quartzite
Hydrothermal Quartz or Quartzite (SiO2)
Granite or Porphyritic Igneous Rock (weathered)
Granitoid
Quartz
Silicon Dioxide (SiO2)
Granite Pebble
Granite (Felsic Plutonic Rock)
Grey Chalcedony
Silicon Dioxide (SiO2)
Carnelian Agate
Silicon Dioxide (SiO2)