Mineral (Synthetic Glass)

Faceted colorless gemstone, likely quartz (rock crystal) or synthetic glass imitation

Quartz: silicon dioxide (SiO₂), trigonal crystal system; exact identity cannot be confirmed visually

Rutilated Quartz

Quartz (SiO2) with Rutile inclusions (TiO2)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Bismuth

Bismuth (Bi)

Amber

Succinite (specifically for Baltic amber; general formula C10H16O)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Gemstone butterfly brooch/pendant

Likely faceted pink tourmaline or synthetic spinel in gilt metal; exact identification requires testing

Corundum

Corundum (Al2O3)

Azurite-Malachite (often a mixed specimen)

Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2(CO3)(OH)2. The specimen appears to be a natural mixture or intergrowth of these two minerals.

Pearl-and-gemstone insect brooch

Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image

Diamond

Diamond (pure carbon; C)

Blue Goldstone

Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)

Opal

Hydrous silicon dioxide (SiO2·nH2O)

Black rectangular gemstone pendant, likely obsidian or black glass imitation

Most plausibly black obsidian (volcanic glass; SiO₂-rich), though the image cannot exclude synthetic glass or black onyx

Diamond (appearing as a jewelry centerpiece)

Diamond (Formula: C)

Blue opal heart cabochon

Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite

Diamond (Rough)

Diamond (Carbon, C)

Goldstone (Red)

Aventurine Glass (SiO2 + Cu)

Colorless faceted gemstone, likely synthetic cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); natural diamond is a less likely alternative

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Goldstone (Brown/Gold variety)

Aventurine Glass (SiO2 with Copper inclusions)

Rutilated Quartz

SiO2 with TiO2 inclusions (Rutile)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)

Blue Tiger's Eye

Riebeckite (crocidolite variety)

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Ruby

Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)

Moonstone (bead form)

Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Lapis Lazuli

A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

Titanium-coated Metal Cube (Man-made Fidget Toy)

Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)

Sapphire

Corundum (Al₂O₃) with trace elements causing color variations.

Apatite

Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))

Prehnite

Prehnite, Ca2Al2Si3O10(OH)2

Tumbled green glassy mineral, possibly aventurine or fluorite

Uncertain; likely quartz variety (aventurine quartz, SiO₂) or green fluorite (CaF₂)

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph

Green glass-like mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), if natural; appearance may also indicate colored glass

Green glassy mineral specimen, likely chromium-bearing fluorite (tentative)

Fluorite, CaF₂, possibly green fluorite; identification uncertain from image

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

Emerald

Beryl (variety Emerald), Be3Al2Si6O18 with Cr and/or V

Blue-green glassy mineral specimen, likely aquamarine or pale fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), aquamarine variety; identification is uncertain from the photograph

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)