Antropogenic (Man Made Glass Byproduct)

Man-made Material (jewelry, metal alloy)

Muscovite Mica

Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2

mineral

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)

Mineral, part of a rock

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.

United States Quarter Dollar

Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)

Metal / Man-made mineral-like object

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

man-made composite (lithified equivalent of sedimentary)

Quartz

Silicon Dioxide (SiO₂)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Smoky Quartz

Smoky Quartz (SiO2)

Synthetic (Man-made material mimicking natural stone)

Chert (or possibly Flint)

Chert (variant: Flint)

Sedimentary

Glazed Ceramic Tile

Fused Silicate-Clay composite

Anthropogenic Heat Source (Electronic/Industrial Interface)

Thermal IR emission (Electronic infrastructure)

not a rock or mineral

Slag (Industrial By-product)

Anthropogenic Vitreous Silica/Iron Silicate

mineral

Slag (Industrial Glassy Byproduct)

Anthropogenic silicate byproduct (Slag)

Mineral-like byproduct (often mistaken for igneous rock or meteorite)

Metallic Ornament / Jewelry

N/A - This is an artificial object, not a geological specimen.

This appears to be a man-made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen.

Iron Slag

Anthropogenic Vitreous Silicate (Byproduct of Smelting)

Mineral-like byproduct

Ferro-Manganese Slag

Vitreous Silicate Slag

Anthropogenic (Industrial byproduct)

Iron Slag

Ferrous Slag (complex silicate and oxide byproduct)

industrial byproduct (anthropogenic)

Iron Slag

Iron smelting byproduct (Glassy/vesicular silicate)

anthropogenic / industrial byproduct

Iron Slag

Ferrous Slag (Silicate/Oxide mixture)

industrial byproduct (anthropogenic)

Iron Slag

Anthropogenic Vitreous Ferrous Silicate

industrial byproduct (anthropogenic)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Technonatural composite (often containing sedimentary/igneous aggregate)

Asphalt (Bituminous Concrete)

Asphaltum / Bitumen-Aggregate Matrix

Red Sandstone

Arenite (Ferruginous Sandstone)

Diabase (Greenstone)

Diabase (Dolerite)

Red Sandstone

Arenite (with Iron Oxide / Hematite staining)

Rose Quartz (likely carved)

Rose Quartz (SiO2)

Ferruginous Sandstone (Ironstone)

Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)

Bog Iron / Limonite Concretion

Goethite/Limonite mixture (FeO(OH)·nH2O)

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Granite

Granite (felsic intrusive igneous rock)

Banded Calcite or Travertine

Calcium Carbonate (CaCO3)

Sedimentary

Garnet Beads

Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)

Coral Rock (Coquina)

Biogenic Limestone (Calcium Carbonate - CaCO3)

Quartz

Quartz (SiO₂)

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

mineral

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)

Obsidian

Obsidian (Volcanic Glass)