Man Made Alloy (Metallic)

Diamond (as featured in jewelry)

Diamond (C - pure carbon)

Vanadinite

Pb5(VO4)3Cl

Tiffany Stone

Bertrandite (Be4Si2O7(OH)2) mixed with Fluorite (CaF2), Opal, and Chalcedony

Vanadinite

Lead Chlorovanadate, Pb5(VO4)3Cl

Polished jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with possible iron-oxide and other mineral inclusions

Note on Image Identification: Textile

N/A (Anthropogenic material)

Bismuth

Bismuth (Bi)

Possible ironstone concretion or weathered mineral nodule

Iron-oxide-rich concretion, likely goethite/limonite; identification uncertain from the photo

Turquoise (likely stabilized or simulated Howlite)

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Flint (gray chert)

Microcrystalline quartz (SiO₂), a variety of chert

Basalt

Basalt

Raw pale-green beryl (likely aquamarine)

Beryl, Be₃Al₂Si₆O₁₈; blue-green variety is aquamarine

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Diamond (Cut jewelry specimen)

Diamond (pure Carbon, C)

Ruby in Matrix

Corundum (Al2O3)

Coquina

Bioclastic Limestone

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Chert (flint) fragment

Microcrystalline quartz (SiO₂), commonly called chert or flint

Pearl necklace

Pearl, primarily aragonite (CaCO₃) and conchiolin

Likely slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Blue chalcedony cabochon (likely)

Chalcedony, microcrystalline SiO₂; possibly blue agate or common opal, which cannot be distinguished confidently from the image

Milky quartz

Quartz (silicon dioxide, SiO₂)

Fossil Sea Urchin (Echinoid)

Echinoidea fossil (often replaced by silica or calcite)

Raw green beryl (likely aquamarine)

Beryl, Be₃Al₂Si₆O₁₈; blue-green variety is aquamarine

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Synthetic Convention Badge (Plastic/PVC)

Polyvinyl Chloride (PVC) / Polycarbonate

Red agate bead (likely dyed or treated)

Agate, a microcrystalline variety of quartz; SiO₂

White drusy quartz

Quartz, silicon dioxide (SiO₂), with a drusy coating of tiny crystals

Diamond (Cut and Polished)

Diamond (pure Carbon, C)

Diamond

Carbon (C)

Rough Sapphire (Corundum)

Corundum (Al2O3)

Pumice

Pumice (Vitreous volcanic rock)

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Arsenopyrite in Quartz Matrix

Arsenopyrite (FeAsS) with Quartz (SiO2)

Tumbled quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Black Jasper

Silicon dioxide (SiO2)

Faceted citrine pendant

Citrine, gem-quality quartz (SiO₂), likely heat-treated amethyst

Likely chert (flint)

Microcrystalline quartz (SiO₂), likely chert; exact identification is uncertain from the image alone

Tumbled blue chalcedony (possibly blue agate)

Microcrystalline quartz, SiO₂; chalcedony variety

Chert (Flint)

Silicon dioxide (SiO2)

Diamond (or Diamond Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)