Synthetic (Ceramic)

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly in a feldspar-bearing granite or pegmatite matrix

Blue cabochon gemstone, likely blue sapphire

Corundum (Al₂O₃), colored blue by trace iron and titanium

Faceted colored gemstones, likely synthetic corundum or glass imitations

Not identifiable from the image; possible synthetic corundum (Al₂O₃)

Faceted yellow gemstone (possibly citrine or synthetic glass)

Undetermined; citrine is yellow quartz (SiO₂), but the image cannot confirm the material

Sapphire

Corundum (Al2O3)

Blue-green faceted pendant stone

Undetermined; possibly synthetic glass or a blue-green gemstone such as topaz or quartz

Opalite

Man-made glass (traditionally simulated Opal)

Emerald

Beryl (Be₃Al₂Si₆O₁₈), colored green by chromium and/or vanadium

Silicon Carbide (Carborundum)

Silicon Carbide, SiC

Amber (and Cubic Zirconia)

Fossilized Tree Resin

Citrine

Silicon Dioxide (SiO2)

Opalite

Synthetic glass / Opaque silicious glass

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Note on Image Identification: Textile

N/A (Anthropogenic material)

Specular Hematite with Pyrite

Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)

Likely iron-rich rock or meteorite fragment

Indeterminate; possible hematite-/magnetite-bearing material

Fossiliferous limestone fragment

Bioclastic limestone, primarily calcite (CaCO₃)

Weathered iron-rich concretion or ironstone pebble

Goethite/hematite-bearing limonite concretion (approximate identification)

Silver-gray metallic ore, possibly galena-bearing rock

Likely galena (PbS) in a host rock, but identification is uncertain from the photograph

Indeterminate metallic mineral fragments

Possibly pyrite, chalcopyrite, or metallic sulfide-bearing rock

Possible iron-rich stone or meteorite fragment

Undetermined; possibly magnetite-bearing rock or an ordinary chondrite

Goldstone

Aventurine Glass (Man-made)

Green gemstone ring (likely synthetic or imitation emerald)

Possibly emerald, beryl (Be₃Al₂Si₆O₁₈); the photo cannot confirm the center stone’s identity or whether it is natural.

Reddish iron-rich pebble, possibly jasper or altered basalt

Likely hematite/goethite-bearing basalt or ferruginous jasper; exact identification requires testing

Botryoidal hematite-rich iron ore (probable)

Hematite, Fe₂O₃, possibly mixed with goethite/limonite

Red jasper (iron-rich chert), possibly weathered hematite-rich material

Jasper: microcrystalline quartz (SiO₂) with iron-oxide inclusions; hematite: Fe₂O₃

Rounded iron-rich pebble, likely lateritic sandstone or ferruginous conglomerate fragment

Hematite/goethite-bearing ferruginous sediment; exact identification requires testing

Weathered iron-rich rock, likely limonite/goethite-bearing sandstone or laterite

Hydrated iron oxides, chiefly limonite (FeO(OH)·nH₂O) and goethite (α-FeO(OH)), possibly cementing sandstone

Hematite

Iron(III) oxide (Fe2O3)

Rounded iron-rich pebble

Likely hematite/goethite-bearing quartzite or ironstone; exact identification requires testing

Small tumbled dark stone, possibly basalt or slag

Likely fine-grained basalt; exact identification is uncertain from the photograph

Small blue cut gemstone, possibly synthetic spinel or glass; species cannot be determined from the photo

Undetermined; blue synthetic spinel (MgAl₂O₄) is one possibility

Red glassy mineral specimen, likely synthetic ruby or red spinel

Most consistent with synthetic corundum (Al₂O₃, ruby) or synthetic spinel (MgAl₂O₄); exact identification requires testing

Red gemstone ring; likely synthetic ruby or red glass

Undetermined from the image; ruby is corundum (Al₂O₃), while red glass is amorphous silicate

Faceted clear gemstone in a metal setting

Unidentified transparent faceted gem; possibilities include quartz (SiO₂), topaz (Al₂SiO₄(F,OH)₂), or glass—the image is insufficient for identification.

Opalite-style glass pendant

Man-made opalescent glass (not natural opal)

Blue-green cut gemstone, possibly aquamarine

Unconfirmed; aquamarine is blue-green beryl, Be₃Al₂Si₆O₁₈

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Blue gemstone ring, likely blue topaz or synthetic blue spinel

Likely topaz (Al₂SiO₄(F,OH)₂) or synthetic spinel (MgAl₂O₄); identification is uncertain from the image

Hematite-rich ironstone concretion

Hematite (Fe₂O₃), likely mixed with goethite/limonite and silica

Flint

SiO2 (Cryptocrystalline Quartz)

Likely kyanite crystal

Kyanite, Al₂SiO₅