Man Made Metamorphic Style Composite

Rounded quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartzite

Quartzite (SiO2)

Carved nephrite jade thumb ring/seal

Nephrite jade: fibrous amphibole aggregate, chiefly tremolite–actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Smoky Quartz Cluster

Smoky Quartz (Silicon Dioxide - SiO2)

Sea Glass

Amorphous Silicon Dioxide (SiO2)

Crackle Glass (Simulated Gemstone)

Amorphous Solid (SiO2)

Blue Goldstone

Synthetic glass with copper or cobalt/manganese inclusions

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)

Blue Goldstone

Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Goldstone (Brown)

Aventurine glass

Iron-rich banded quartzite / jaspilite

Banded iron formation (BIF), chiefly quartz (SiO₂) and iron oxides (hematite, Fe₂O₃; magnetite, Fe₃O₄)

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

Quartzite Pebble

Quartzite (SiO2)

Porcelain (Kaolin-based)

Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)

Banded Gneiss

Gneiss (pronounced 'nice')

Baroque Pearl (and potentially a small Sapphire/Blue Topaz)

Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.

Clear Quartz

Silicon Dioxide (SiO2)

Tree Agate

Chalcedony (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Tumbled ruby-in-zoisite (likely)

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

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)

Polished yellow-green serpentine pendant

Serpentine-group minerals, chiefly antigorite and/or lizardite; approximate formula Mg3Si2O5(OH)4

Pyrite

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Tumbled greenstone (likely serpentinite or green jasper)

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

Quartzite

Quartzite (SiO2)

Pyrite

Iron Sulfide (FeS2)

Gold

Native Gold (Au)

Lapis Lazuli

Lapis Lazuli (a rock, not a single mineral; primary mineral is Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Sunstone

Aventurine Feldspar (Plagioclase Feldspar with inclusions)

Jasper (Iron-rich Chalcedony)

Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)

Common Marble

Calcium Carbonate (CaCO3)

Lapis lazuli bead bracelet

Lapis lazuli, chiefly lazurite (Na₃Ca(Si₃Al₃)O₁₂S); commonly with calcite and pyrite

Quartzite

Quartzite (SiO2)

Clear quartz crystal pendant

Quartz (silicon dioxide, SiO₂)

Nephrite Jade

Nephrite

Tumbled greenstone / serpentinite (probable)

Serpentinite, chiefly Mg-rich serpentine minerals (antigorite, lizardite, chrysotile), possibly mixed with chlorite, magnetite, or carbonate

White Marble

Recrystallized Calcite (CaCO3)