Pumice
Pumicite (Amorphous volcanic glass)
Igneous
Category
Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)
Browse organic (if resin) or synthetic (if glass); simulating sedimentary or metamorphic (for natural stones) specimens identified by the Rock Identifier community.
Milky Quartz (with Chlorite/Mineral Inclusions)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Beach Pebble (Chert/Quartzite)
Microcrystalline Quartz (SiO2)
sedimentary
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Ironstone Pebble
Ferruginous sedimentary rock (Fe2O3 / FeO(OH) mixed with SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2 with minor Fe2O3)
sedimentary
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Ferruginous Sandstone (with possible trace fossils)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3)
sedimentary
Smoky Quartz (Ferruginous Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
sedimentary
Sandstone (Water-worn Pebble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Chert (Green Jasperiod)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Sandstone Cobble
Arenite (Secondary classification based on grain size)
sedimentary
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Mineral (Man-modified)
Slag
Ferrous Slag (Siliceous industrial waste)
Anthropogenic (Man-made industrial byproduct)
Tiger's Eye
Pseudomorph of Crocidolite (SiO2 with iron oxides)
mineral
Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
sedimentary
Tiger's Eye
SiO2 (Pseudomorph of Quartz after Crocidolite)
metamorphic
Rose Quartz
Silicon dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Limestone (Gritstone/Marl)
CaCO3 (Calcium Carbonate) with Fossil Inclusions
sedimentary
Dendritic Jasper (River Stone)
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Chert (White Variety)
Silicon Dioxide (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (with biological crust)
Arenite (SiO2 based)
sedimentary
Amethyst (Tumbled Chips)
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
mineral
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Sandstone
Sandstone (lithified sand)
sedimentary
Raw Citrine
Citrine (Silicon Dioxide - SiO2)
mineral
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Jasper and Chert Conglomerate
Ferruginous Microcrystalline Quartz (SiO2)
sedimentary
Fossil Coral (Favosites Honeycomb)
Favosites (Genus), Phylum Cnidaria, Class Anthozoa
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Rough Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
mineral