Quartzite with Quartz Vein
Metamorphosed Quartz-rich Arenite (SiO2)
metamorphic
Category
Sedimentary (If Natural Jasper) Or Artificial (If Slag)
Browse sedimentary (if natural jasper) or artificial (if slag) specimens identified by the Rock Identifier community.
Quartz (Milky or Iron-stained)
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert / Flint Nodule
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Tiger's Eye (Small Polished Bead)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Ironstone Concretion (likely)
Goethite/Hematite/Limonite cemented sediment
Sedimentary Rock
Peach Selenite / Orange Gypsum
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Amber
Succinite (fossilized resin, C10H16O)
mineral
Amethyst (Geode)
Silicon Dioxide with Iron impurities (SiO2)
mineral
Granitic Pegmatite
Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)
There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).
Mineral
Rhodonite beads (possibly dyed or treated, or lower quality Rhodonite)
Manganese inosilicate, (Mn,Fe,Mg,Ca)SiO3
Mineral
Vesicular Basalt (or Scoraceous Basalt)
Basalt with vesicular texture
igneous
Basalt
Basalt (composition of plagioclase, pyroxene, and olivine)
igneous
Chrysocolla
Chrysocolla: Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
mineral
Chrysocolla
Chrysocolla, (Cu, Al)2H2Si2O5(OH)4·nH2O
mineral
Amethyst
Silicon dioxide (SiO2)
mineral
Sandstone with trace fossil
Sandstone, possibly with Skolithos or similar trace fossil
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
mineral
Chrysocolla in Matrix
Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Fossiliferous Limestone
Bioclastic Limestone (composition: CaCO3)
sedimentary
Black Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Chert (Chert Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Agate (Fortification Agate)
Banded Chalcedony (SiO2)
mineral
Quartz Vein in Host Rock (Pebble)
Quartz (SiO2) with sandstone or siltstone matrix
metamorphic/igneous transition
Quartzite (River Cobble)
Metamorphic Quartz-rich Rock
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Amber with Organic Inclusions
Succinite (fossilized resin)
mineraloid
Amber (Dark/Black Variety)
Succinite (Resinite), C10H16O
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Basalt
Basalt (Mafic volcanic rock)
igneous
Chondrite Meteorite
L3 Chondrite (Unequilibrated Ordinary Chondrite)
igneous
Yellow Quartzite Pebble
Metamorphosed Sandstone (SiO2 with iron oxide impurities)
metamorphic
Quartz / Calcite Vein Rock
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Quartz Pebble (Water-worn)
Silicon Dioxide (SiO2)
mineral
Black Obsidian
Obsidian, volcanic glass (Amorphous SiO₂)
Igneous Rock
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral