Synthetic (Ceramic)

Sunstone

Plagioclase Feldspar (Na,Ca)(Si,Al)4O8

Quartzite

Quartzite (SiO2)

Shale

Fissile mudstone (Shale)

Sunstone (Heliolite)

Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)

Quartzite (River Pebble)

Metamorphosed Quartz Sandstone (SiO2)

Blue Goldstone

Man-made glass infused with copper crystals

Amethyst quartz cluster

Quartz, SiO₂; purple variety amethyst

Carved red jasper bead (likely ceramic imitation)

Jasper, microcrystalline quartz (SiO₂); exact material uncertain from the image

Tumbled pink feldspar pebble

Potassium feldspar, commonly microcline or orthoclase (KAlSi₃O₈)

Lepidolite in Mica Schist

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Lepidolite

K(Li,Al)3(Al,Si,4)10(O,F,OH)2

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Amazonite with Smoky Quartz and Feldspar

Microcline (KAlSi3O8) with Quartz (SiO2)

Sandstone (Weathered Cobble)

Clastic Sedimentary Rock (primarily SiO2)

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Quartz-rich feldspathic rock, possibly granite or arkose

Granite-like aggregate of quartz (SiO₂), feldspar, and minor iron oxides

Iron-rich sandstone or lateritic pebble

Ferruginous sandstone; chiefly quartz (SiO₂) cemented by iron oxides such as hematite/goethite

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Green faceted gemstone, likely synthetic glass or peridot

Indeterminate from image; possible peridot (olivine, (Mg,Fe)₂SiO₄) or green synthetic glass

Blue Sapphire (likely costume glass imitation)

Corundum (Al2O3) with iron/titanium impurities

Weathered iron-rich rock (likely basalt or ironstone)

Probable altered basalt; exact identification requires testing

Tumbled limestone pebble

Micritic limestone, chiefly calcite (CaCO₃)

Chert or chalcedony fragment

Microcrystalline quartz (SiO₂), possibly jasper or agate

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

Faceted transparent gemstone pendant

Likely cubic zirconia (zirconium dioxide, ZrO₂); possibly diamond or synthetic moissanite

Painted Rock

Weathered Sedimentary Rock (Painted)

Painted River Rock

Painted Quartzite or Smooth Siltstone

Dark tumbled mineral/rock fragment (tentatively hematite-rich material)

Likely hematite (Fe₂O₃), possibly magnetite-bearing ironstone

Iron-rich weathered rock (likely limonite/goethite concretion)

Limonite–goethite mixture; chiefly FeO(OH)·nH₂O

Tumbled hematite (likely hematite-rich ironstone)

Hematite, Fe₂O₃; possibly mixed with magnetite or goethite

Iron-rich meteorite candidate

Unclassified iron meteorite, possibly an ordinary chondrite or weathered iron oxide-rich meteorite

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Water-worn ironstone pebble (probable concretion)

Ferruginous sandstone or iron-rich mudstone concretion; chiefly quartz and iron oxides/hydroxides (hematite, goethite, limonite)

Faceted gemstone in a jewelry setting

Indeterminate from image; likely quartz, cubic zirconia, or another transparent faceted stone

Silicon Carbide

Silicon Carbide, SiC

Opalite

Synthetic Glass (Silica-based)

Synthetic Faux Fur Fursuit

Polyacrylonitrile / Polyester (Synthetic Textile)

Opaline Glass (Opalite)

Synthetic Silicon Dioxide Glass

Opalite

Synthetic Glass (Simulated Opal)