Anthropogenic (Man Made Industrial Byproduct)

Probable amber fragment

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

Rough Diamond

Pure Carbon (C)

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Dark, weathered stone—possibly basalt or slag

Indeterminate; likely fine-grained basalt (plagioclase–pyroxene)

Multicolor quartz bead bracelet

Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz

Sandstone

Arenite (SiO2 based clastic rock)

Chert / Jasper

Silicon Dioxide (SiO₂)

Diamond

Diamond (pure Carbon, C)

Fossil crinoid columnal in limestone

Crinoidea indet.; calcitic ossicle (CaCO₃)

Diamond

Cubic carbon (C)

Fossilized sea urchin

Echinoid test, likely a regular sea urchin; calcite (CaCO₃)

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Diamond

C (Carbon)

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Tumbled ruby-in-zoisite (likely)

Ruby-bearing zoisite; zoisite Ca₂Al₃(SiO₄)₃(OH), corundum ruby Al₂O₃

Corundum (Sapphire variant)

Aluminium oxide (Al2O3)

Note: Item is not a geological specimen

Polyester mesh and Ethylene-vinyl acetate (EVA) polymer

Diamond

Carbon (C)

Rough Diamond

Diamond (pure Carbon, C)

Basalt

Basalt

Fossilized echinoid (sea urchin), likely a sand dollar fragment or small regular urchin

Echinodermata; commonly Clypeasteroida or Echinoida, preserved mainly as calcite (CaCO₃)

Likely iron-rich rock or weathered metallic mineral fragment

Uncertain; possibly limonite/goethite or iron-bearing slag

Tumbled greenstone (likely serpentinite or green jasper)

Serpentinite, commonly dominated by serpentine-group minerals (Mg₃Si₂O₅(OH)₄); exact identification requires testing

Botryoidal chalcedony with quartz vug

Microcrystalline quartz, SiO₂ (chalcedony), with a drusy quartz-lined cavity

Diamond ring

Diamond, crystalline carbon (C)

Small metallic-looking mineral/rock fragment

Indeterminate from image; possibly galena, hematite, or metallic slag

Chert (Yellow Jasper/Flint pebble)

Microcrystalline Quartz (SiO2)

Diamond

Native Carbon (C)

Diamond (in jewelry setting)

Carbon (C)

Diamond

Carbon (C)

Tourmalinated quartz point

Quartz (SiO₂) with black tourmaline (schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) inclusions

White Marble

Recrystallized Calcite (CaCO3)

Diamond

C (Pure Carbon)

Unidentified gray metallic object

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

Diamond

Carbon (C)

Granite (Pegmatitic)

Phaneritic Felsic Igneous Rock

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Diamond (in jewelry setting)

Adamantine Carbon (C)

Colorless faceted gemstone, likely glass or quartz

Uncertain; possibly quartz (SiO₂), but the strong uniform brilliance and apparent molded/faceted form may indicate leaded glass or cubic zirconia

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Chert (and Jasper/Chalcedony mixture)

Microcrystalline Quartz (SiO2)

Diamond-set letter “L” jewelry piece

Diamond (crystalline carbon, C) set in a metal mount; the metal is not identifiable from the image