Anthropogenic Material (Man Made Rock)

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)

Blue Goldstone

Aventurine Glass (SiO2 with Cobalt/Copper inclusions)

Vesicular basalt (possibly slag-contaminated)

Basalt; chiefly plagioclase and pyroxene, with possible olivine and secondary minerals

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

Diamond

Native Carbon (C)

Probable amber fragment

Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)

Unidentified gray metallic object

Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material

Lava Rock (Dyed)

Basalt / Volcanic scoria

Pumice

Pumice (Vitreous volcanic rock)

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Ferruginous Slag (Iron Smelting Byproduct)

Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)

Flint (chert)

Microcrystalline quartz (SiO₂), a variety of chert

Moissanite

Silicon Carbide (SiC)

Diamond (as set in a metal alloy ring)

Diamond (Pure Carbon, C)

Diamond Druzy (Crystalline Diamond)

Carbon (C)

Chert (Flint)

Silicon Dioxide (SiO2)

Coquina

Bioclastic Limestone

Gabbro

Gabbro

Dark gneiss or migmatitic amphibolite

Band ed gneiss; composition likely quartz–feldspar–biotite/amphibole, possibly migmatite

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Grooved Maun Ball (Maul/Hammerstone-like Concretion)

Calcareous/Ferruginous Concretion in Sandstone Matrix

Polished orbicular jasper

Jasper, microcrystalline quartz (SiO₂), with iron oxides and other inclusions

Chert (variations include Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Engraved purple stone cabochon, possibly amethyst

Unconfirmed; if amethyst, quartz (SiO₂)

Crushed Limestone

Calcium Carbonate (CaCO3)

Red agate bead (likely dyed or treated)

Agate, a microcrystalline variety of quartz; SiO₂

Coquina

Bioclastic Limestone (Calcium Carbonate, CaCO3)

Likely chert (flint)

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

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Tumbled greenstone / serpentinite (probable)

Serpentinite, chiefly Mg-rich serpentine minerals (antigorite, lizardite, chrysotile), possibly mixed with chlorite, magnetite, or carbonate

Ruby in Matrix

Corundum (Al2O3)

Gemstone jewelry ensemble

Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image

Dark rounded pebble, likely basalt or slag

Probable fine-grained mafic rock; possibly basalt (plagioclase–pyroxene) or industrial iron/steel slag

Chert (Nodular or Massive Variety)

Cryptocrystalline Quartz (SiO2)

Diorite

Diorite (Intermediate intrusive igneous rock)

Stone bead bracelet

Unidentified polished natural-stone beads; possibly wood-grain jasper, agate, or serpentine

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Red-orange sunstone (likely aventurine feldspar) bead bracelet

Feldspar, commonly oligoclase or labradorite with copper inclusions; composition varies by source

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert or Jasper

Microcrystalline Quartz (SiO2)

Coquina

Bioclastic Limestone