Man Made Object (Coin)

Tiger's Eye

Tiger's Eye (a variety of Quartz, SiO₂)

Calcite

Calcite (CaCO 3)

Chert (or Flint)

Chert (a cryptocrystalline variety of quartz, SiO2)

Nephrite Jade

Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2

Bloodstone

Heliotrope (a variety of Chalcedony, SiO₂ with inclusions)

Amethyst

Quartz variety; chemical formula: SiO₂ (silicon dioxide) with Fe³⁺ impurities

Onyx (beads)

SiO2 (Cryptocrystalline Quartz)

Peridot

Olivine (Mg,Fe)2SiO4

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Titanium Coated Aura Quartz (Apple Aura Quartz)

Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

Jade (likely Jadeite)

Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)

Unakite

Epidote-Feldspar rock

Aventurine (likely Green Aventurine)

Silicon Dioxide (SiO2) with included minerals (Fuchsite for green)

Calcite (likely a tumbled specimen)

Calcite (CaCO 3 )

Cullet Glass (Industrial Slag Glass)

Amorphous Silica (SiO2) with metallic oxide impurities

Chert / Flint

Chert (varieties include Flint)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Dyed Howlite (simulating Lavender/Purple Jade or Charoite)

Howlite: Ca2B5SiO9(OH)5 (when natural)

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.

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.

Jasper and Aquamarine (likely)

Jasper (Cryptocrystalline Quartz (SiO2)), Aquamarine (Beryl (Be3Al2Si6O18))

Agate (or Chalcedony)

SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz

Agate

Chalcedony (cryptocrystalline quartz)

Citrine

Quartz (SiO2) - specifically, a variety of macrocrystalline quartz

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)₈[(S,Cl,SO₄,OH)₂|(Al₆Si₆O₂₄)], with varying amounts of Calcite, Pyrite, and Sodalite.)

Quartz (Pebble)

Quartz (SiO₂)

Glazed Ceramic Tile

Fused Silicate-Clay composite

Hematite

Hematite (Fe2O3)

Green Aventurine

Aventurine Quartz (SiO2 with fuchsite inclusions)

Aventurine (Green Aventurine)

Quartz with Fuchsite Inclusions (SiO2)

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)

Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)

Jade (likely Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Orange Calcite (likely polished specimen)

Calcite

Leopard Skin Jasper

Chalcedony (cryptocrystalline Quartz)

Rhodonite

Rhodonite (MnSiO3)

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Serpentine

Serpentinite (rock) containing serpentine minerals (e.g., Antigorite, Lizardite, Chrysotile)

Basalt

Basalt

Aventurine (likely Green Aventurine)

Silicon Dioxide (SiO2) with various inclusions

Rhodonite

Rhodonite (MnSiO3)