Anthropogenic (Man Made Industrial Deposit)

Red faceted gemstone, possibly synthetic ruby or red glass

Unidentified red gem; ruby is corundum (Al₂O₃), while glass is amorphous silicate

Yellow Sapphire (Corundum)

Corundum (Aluminum Oxide, Al2O3)

Smoky quartz (likely citrine-colored quartz) ring

Quartz, SiO₂; precise variety cannot be confirmed from the photograph

Turquoise-style beaded bracelet

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed or composite beads

Diamond

C (Pure Carbon)

Rounded river pebble

Likely lithic sandstone or weathered quartz-rich rock; exact identification requires testing

Blue gemstone ring (likely sapphire)

Likely corundum, Al₂O₃; the dark, reflective appearance may also indicate a treated or synthetic stone.

Unidentified gray metallic object

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

Mixed polished gemstone and mineral collection

Primarily quartz varieties (SiO₂), plus probable aventurine, rose quartz, amethyst, agate, jasper, serpentine, feldspar, and possibly dyed or man-made glass pieces

Green Slag Glass

Cullet (Amorphous Silicon Dioxide with impurities)

Diamond (in a cluster setting)

Crystallized Carbon (C)

Pink-and-cream mineral bead bracelet (likely rose quartz and pale quartz)

Quartz, SiO₂; rose quartz is pink quartz, though the beads may include other pale stones.

Granite (Pegmatitic)

Phaneritic Felsic Igneous Rock

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

Chalcedony

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Chert (and Jasper/Chalcedony mixture)

Microcrystalline Quartz (SiO2)

Faceted glass-like gemstone object

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

Diamond-set letter “L” jewelry piece

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

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Tumbled chert or jasper pebble

Microcrystalline quartz (SiO₂), likely chert/jasper

Red-orange sunstone (likely aventurine feldspar) bead bracelet

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

Chert or flint fragment

Microcrystalline quartz (SiO₂), likely chert/flint

Pink feldspar-rich rock, likely rose quartz or pink granite fragment

Indeterminate from image; possible potassium feldspar (orthoclase, KAlSi₃O₈) or quartz (SiO₂)

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Diamond (Cluster Ring)

Carbon (C)

Fossilized oyster shell

Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite

White quartz geode nodule

Quartz (SiO₂), likely a quartz-lined geode or vug in a host rock

Polished heart-shaped blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly blue lace agate or dyed quartz

Banded Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz (Milky or Smoky)

Silicon Dioxide (SiO2)

Bumblebee Jasper

Anhydrite with Sulfur, Hematite, and Orpiment (SiO2/CaSO4 mixture)

Rounded river pebble, likely altered limestone or sandstone

Probable micritic limestone (calcite-rich, CaCO₃) or fine-grained sandstone

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Silver (Native or Alloyed)

Ag (Argentum)

Likely chalcedony (gray agate), rough fragment

Microcrystalline quartz, SiO₂; “agate” applies if distinct banding is present

Pearl

Calcium Carbonate (CaCO3) - Aragonite/Calcite

Amethyst

Amethyst (Silicon Dioxide - SiO2 with Iron impurities)

Crushed Limestone

Calcium Carbonate (CaCO3)

Blue chalcedony cabochon (likely)

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

Weathered iron-rich pebble

Likely ferruginous sandstone or ironstone; exact identification requires testing

Sandstone

Arenite (composed primarily of SiO2)

Tumbled brown chert or weathered sandstone pebbles

Microcrystalline quartz (chert), possibly iron-stained sandstone; SiO₂ dominant