Diamond (in jewelry setting)
Adamantine Carbon (C)
mineral
Category
Industrial Byproduct (Often Mistaken For Obsidian Or Mineral)
Browse industrial byproduct (often mistaken for obsidian or mineral) specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct (Often Mistaken For Obsidian Or Mineral) in the encyclopedia
View all →
Dumortierite Quartz (Blue Quartz)
Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)
mineral
Greenschist
Chlorite schist
metamorphic
White Howlite
Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)
mineral
Basalt with Desert Varnish
Mafic Volcanic Rock (Fe/Mg rich Silicate)
igneous
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)
Diamond
Carbon (C)
mineral
Sandstone Moqui Marble (Concretion)
Iron oxide concretion (Hematite/Goethite and Quartz)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Milk Quartz (White) and Yellow Aventurine (Yellow)
Silicon Dioxide (SiO2)
mineral
Olivine (Peridotite/Dunite)
Olivine (Mg,Fe)2SiO4 within Peridotite
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Synthetic Convention Badge (Plastic/PVC)
Polyvinyl Chloride (PVC) / Polycarbonate
mineraloid (synthetic)
Raw Diamond
Diamond (pure Carbon, C)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Porphyritic Basalt (Chinese Writing Stone)
Porphyritic Basalt with Feldspar Phenocrysts
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Iron-Stained)
Chert (Silicon Dioxide, SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Garnet-Bearing Gneiss
Almandine-Garnet Gneiss
metamorphic
Red Quartzite
Quartzite (SiO2 with iron oxide impurities)
metamorphic
Ruby
Corundum (Al2O3:Cr)
mineral
Muscovite Schist
Muscovite (KAl2(AlSi3O10)(OH)2) in Schist
metamorphic
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Organic / Biological
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Amethyst (variety of Quartz)
SiO2 (Silicon Dioxide) with trace iron impurities
Mineral
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Red Shale
Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)
sedimentary
Banded Agate (often called Brown Agate or Chalcedony)
Silicon Dioxide (SiO2)
mineral
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
mineral
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Agate (Beads)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate - CaCO3)
mineral
Amethyst (variety of Quartz)
SiO2 (Silicon Dioxide)
Mineral
Agate (Dyed High-Grade Polished Slice)
Silicon dioxide (SiO2), Chalcedony crystal variety
mineral