Mineral (Processed Alloy)

Peridot

Olivine (specific variety: gem-quality forsterite), (Mg,Fe)2SiO4

Rhodonite

Rhodonite (MnSiO3)

White Jade (Nephrite)

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

Granite

Granite (a felsic intrusive igneous rock composed primarily of quartz, feldspar, and mica)

Amber with Inclusion

Succiniferous fossil resin (C10H16O)

mineraloid

Concretion

Various mineral compositions, typically carbonate or iron oxide cemented sediment

Sedimentary

Blue Dyed Agate Geode

Chalcedony (cryptocrystalline Quartz), SiO2

Man-made Material / Glass

Opalite (Man-made Glass)

Fused glass (typically made of dolomite and metal opacifiers)

Rounded gray stone, likely quartz-rich granitic rock

Probable granite or granitic gneiss; mainly quartz, feldspar, and mica

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or iron oxide inclusions

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Granite

Granite (Felsic Plutonic Rock)

Jasper (specifically Brecciated or Agated Jasper)

Silicon Dioxide (SiO2) - Chalcedony with impurities

Mineral / Sedimentary

Water and Silt (Sedimentary Environment)

Suspended Sediment / H2O (dihydrogen monoxide)

River Cobble (Gneiss/Migmatite)

Gneissic Metamorphic Rock (composed mainly of Quartz, Feldspar, and Biotite)

Citrine (Heat-Treated)

Silicon Dioxide (SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2 + Fe)

Petrified Wood

Silicified wood (Quartz/Chalcedony)

Sedimentary

Petrified Wood

Silicified Wood (SiO2 permineralization)

fossil

Banded Gneiss

Gneiss (variable mineral composition)

Chalcedony (Common Opal/Chert variety)

Silicon Dioxide (SiO2)

Schist

Schist (various mineral compositions)

Metamorphic

Lapis Lazuli

Lapis lazuli (primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite inclusions

Mineral (Synthetic - Paper and Ink Polymorph)

Gastly (Trick or Trade Halloween Series)

Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)

Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)

There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).

Travertine (often colloquially called Tufa)

Chemical Sedimentary Calcium Carbonate (CaCO3)

Weathered granite cobble

Granite (quartz–feldspar–mica rock; commonly containing quartz, K-feldspar, plagioclase, and biotite)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Quartzite

Quartzite (primarily SiO2)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, and Chrysotile, (Mg,Fe)3Si2O5(OH)4)

Basalt River Stone with Mineral Crust

Aphanitic Mafic Igneous Rock

Quartz

Quartz (SiO₂)

Quartz (Druzy) in host rock

SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)

Jasper (likely a variety of Brecciated Jasper or a patterned variety)

Silicon dioxide (SiO2)

Porphyry (Rhyolite or Andesite Porphyry)

Porphyritic Igneous Rock

Petrified Wood

Silicified Wood (SiO2)