Synthetic Glass (Man Made)

White Marble

Recrystallized Calcite (CaCO3)

Pearl (Biogenic Mineraloid)

Calcium carbonate (Aragonite) and Conchiolin, CaCO3

Azurite-Malachite (often a mixed specimen)

Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2(CO3)(OH)2. The specimen appears to be a natural mixture or intergrowth of these two minerals.

Blue Tiger's Eye

Riebeckite (crocidolite variety)

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

BROWN GRANITE (likely 'Tan Brown' or similar)

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

Oak-grain Laminate (Industrial/Decorative Furniture Finish)

Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)

Textile (Upholstery Fabric)

Woven Polyethylene/Polyester or Cotton Blend

Bowling Ball (Brunswick T-Zone Deep Space)

Polyester resin / Polyurethane polymer

Crushed Limestone

Calcium Carbonate (CaCO3)

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)

Apatite

Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))

Prehnite

Prehnite, Ca2Al2Si3O10(OH)2

Quartz

Silicon Dioxide (SiO₂)

Marble

Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Chert (or possibly Flint)

Chert (variant: Flint)

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Granite Cobble/Pebble

Granite

Serpentinite

Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)

Marble

Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Emerald

Beryl (variety Emerald), Be3Al2Si6O18 with Cr and/or V

Green Slag Glass (Cullet)

Amorphous Silica (Industrial Glass Byproduct)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

N/A - Image is non-geological

Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)

Jade (likely Nephrite Jade based on appearance)

Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Fossiliferous Limestone

Limestone (composed primarily of calcite with included fossils CaCO3)

Granite

Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Asphalt

Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)

Rose Quartz (likely carved)

Rose Quartz (SiO2)

White Jade (Nephrite)

Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2

3D Printed PLA Elephant (Silk Multi-color)

Polylactic Acid (C3H4O2)n

Portable Ceramic Space Heater

Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements

Garnet Beads

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

Gold

Aurum (Au)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Chert (variant of Flint)

Chert (SiO2)

Gold (Elemental Metal)

Gold (Au)