Chert (Flint)
Microcrystalline Quartz (SiO2)
Category
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Chert (Flint)
Microcrystalline Quartz (SiO2)
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides
Lapis Lazuli
Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)
Flint / Chert
Microcrystalline quartz (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (Flint Arrowhead)
Silicon Dioxide (SiO2)
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
Malachite
Malachite (Cu2CO3(OH)2)
Chert (Black Chert or Flint)
Silicon Dioxide (SiO2)
Chert (Flint Nodules)
Cryptocrystalline Quartz (SiO2)
Tektite (Indochinite)
Tektite (Amorphous Silica Glass)
Natural Pearl (appearing in a jewelry setting)
Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin
Rough Diamond
Diamond (pure Carbon, C)
Chert
Cryptocrystalline Quartz (SiO2)
Diamond
Native Carbon (C)
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Banded Chert
Microcrystalline Quartz (SiO2)
Blue calcite sphere
Calcite (CaCO₃), commonly blue-calcite variety
Pearl-and-gemstone insect brooch
Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image
Chert (or Flint)
Chert (a cryptocrystalline variety of quartz, SiO2)
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
Metal Alloy (Jewelry)
Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.
Petoskey Stone
Favosites alpenensis
Graphite
Graphite (Carbon, C)
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite/Magnetite inclusions)
Chert
Microcrystalline quartz (SiO2)
Diamond
Carbon (C)
Chert (Flint)
Chert (SiO2)
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
Chert (Green Chert or Jasper)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Dumortierite in Quartz
Dumortierite (Al6O3(BO3)(SiO4)3) with Quartz (SiO2)
Brown Chert
Microcrystalline Quartz (SiO2)
Raw Diamond
Carbon (C)