Man Made Byproduct (Often Mistaken For Obsidian Or Emerald)

Pearl (Biogenic Mineraloid)

Calcium carbonate (Aragonite) and Conchiolin, CaCO3

Beryl (likely Aquamarine) in matrix

Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)

Sandstone (with potential Arkose/Lithic characteristics)

Arenite (Sedimentary rock composed of sand-sized grains)

Onyx (Black) and Mother of Pearl Inlay

Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Beryl (Emerald Variety)

Beryllium Aluminum Silicate (Be3Al2(SiO3)6)

Green Schist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Specular Hematite (Specularite) in Matrix

Specularite (Fe2O3)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Pyrite

Iron Sulfide (FeS2)

Diorite

Phaneritic Intermediate Igneous Rock

Sodalite

Sodalite [Na8(Al6Si6O24)Cl2]

Sandstone (Ferruginous Concretion)

Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement

Sandstone Concretion

Sedimentary Concretion (SiO2 or CaCO3 cemented)

Black Obsidian

Obsidian, SiO2 (amorphous)

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

Chert (Flint)

Silicon Dioxide (SiO2)

Sandstone Concretion

Clastic sedimentary rock (primarily Silica, SiO2, or Calcium Carbonate, CaCO3)

Yellow Quartzite or Yellow Jasper

Quartzite (primarily SiO2 with Iron oxide staining)

Note: This is a Man-Made Object (Costume/Prop Patch)

Synthetic fiber and pigments (Cellulose/Plastic-based composite)

Malachite

Malachite (Copper Carbonate Hydroxide, Cu2CO3(OH)2)

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Ironstone concretion / Limonitic Sandstone

Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)

Sandstone (Micaceous Sandstone)

Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)

Sodalite

Na8(Al6Si6O24)Cl2

Rough Ruby

Corundum (Al2O3) with Chromium traces

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Yellow Quartz

Silicon Dioxide (SiO2)

Cubic Zirconia (Man-made)

Cubic Zirconia (ZrO2) with Enamel and Metal Alloy

Diorite (Salt and Pepper Rock)

Diorite

Peridot (likely, based on color and appearance)

Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)

Goldstone

Not a natural mineral or rock. It is an ornamental glass.

Synthetic Faux Fur Fursuit

Polyacrylonitrile / Polyester (Synthetic Textile)

Orange Calcite (Banded Calcite)

Calcite (Calcium Carbonate, CaCO3)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Quartz (Iron-stained)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Chert (and/or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Vesicular Basalt (Scoria)

Vesicular Basalt

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Ironstone (likely Limonite or Goethite nodule)

Hydrothermally altered Ferric Hydroxide (FeO(OH)·nH2O)

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2