Synthetic (Man Made Glass)

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Granite, possibly granodiorite

Coarse-grained felsic plutonic rock; chiefly quartz (SiO₂), potassium feldspar and plagioclase feldspar, with biotite and/or hornblende

Apatite

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

Quartz

Silicon Dioxide (SiO₂)

Tumbled sodalite with white calcite veining

Sodalite, Na8(Al6Si6O24)Cl2, commonly intergrown with calcite, CaCO3

Granite Cobble/Pebble

Granite

N/A - Image is non-geological

Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Green Slag Glass (Cullet)

Amorphous Silica (Industrial Glass Byproduct)

Magnetic Hematite

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

Chert (or possibly Flint)

Chert (variant: Flint)

Jade (likely Nephrite Jade based on appearance)

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

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

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)

Emerald

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

Polymictic breccia, possibly volcanic breccia

Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals

Green glassy slag or manufactured glass bead

Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral

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)

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

Asphalt

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

White Jade (Nephrite)

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

Clay (as a rock-forming material)

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

Jade (Nephrite or Jadeite)

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

Muscovite Schist

KAl2(AlSi3O10)(OH)2 (Muscovite) in Schist Matrix

Rose Quartz (likely carved)

Rose Quartz (SiO2)

Gold

Aurum (Au)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Sea Glass (Frosted Glass Fragment)

Amorphous Silica (Anthropogenic Sediment)

Sea Glass (Frosted Quartz/Glass)

Amorphous Silicon Dioxide (SiO2)

Chert (variant of Flint)

Chert (SiO2)

Libyan Desert Glass

Libyan Desert Glass (Impactite)

Sea Glass

Silica (SiO2) - Amorphous

Snowflake Obsidian

Spherulitic Obsidian (Amorphous volcanic glass with Phenocrysts of Cristobalite)

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Muscovite Mica (Golden/Yellow variety)

KAl2(AlSi3O10)(F,OH)2

Chert (Iron-stained)

Microcrystalline Silica (SiO2)