Diamond (Set in Jewelry)
C (Native Carbon)
mineral
Category
Anthropogenic (Man Made Industrial Byproduct)
Browse anthropogenic (man made industrial byproduct) specimens identified by the Rock Identifier community.
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Green Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Red Sandstone
Arenite (primarily Quartz with Iron Oxide coating)
sedimentary
Diamond
Carbon (C)
Mineral
Jasper pebble
Jasper (Silicon Dioxide, SiO2)
sedimentary
Green Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Red Jasper (River Siltstone)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sapphire
Corundum (Al2O3)
mineral
Amethyst and Limestone
Amethyst (SiO2 - Silicon Dioxide) and Limestone (CaCO3 - Calcium Carbonate)
The purple specimen is a mineral (Amethyst); the white specimen is a sedimentary rock (Limestone or Marble).
Red Shale
Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite), Formula: SiO2 (Quartz) + Fe2O3 (Hematite coating)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite with Sandstone/Iron staining
Metamorphic Quartzite (SiO2)
metamorphic
Bull Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Kimberlite
Kimberlite (Porphyritic Peridotite)
Igneous
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Coarse Sand Grain / Lithic Fragment
Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Quartz Cobble (with Iron Staining)
Silicon Dioxide (SiO2)
mineral
Diamond
Diamond (Pure Carbon, C)
mineral
Diamond (set in jewelry)
Diamond (Carbon, C)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Diamond (Princess Cut Faceted Gemstone)
Native Carbon (C)
mineral
Diamond
Diamond (C)
mineral
Rainbow Fluorite
Calcium Fluoride (CaF2)
mineral
Agate (River Pea)
Microcrystalline Chalcedony (SiO2)
sedimentary
Dumortierite Quartz (Blue Quartz)
Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)
mineral
Vesicular Basalt
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Quartz (Translucent/Rose variety)
Silicon Dioxide (SiO2)
mineral
Agate
Banded Chalcedony (SiO2)
mineral
Diamond
Diamond (C)
mineral
Rough Diamond
Diamond (Native Carbon), C
mineral
Diamond
Carbon (C)
mineral