Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material)

Ruby

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

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Red Tiger's Eye beads

Tiger's Eye (variety of Chalcedony, SiO2)

Granite (tumbled pebble)

Granite (Plutonic Igneous Rock)

Marble

Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.

Banded Gneiss

Gneiss (pronounced 'nice')

Turquoise

Turquoise (Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O)

Labradorite (tumbled)

Labradorite (a plagioclase feldspar mineral between anorthite and albite; chemical formula: (Ca,Na)(Si,Al)4O8)

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Quartz

Silicon Dioxide (SiO2)

Amber (Simulated/Faturan Style)

Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)

Mixed Gemstone Bracelet

Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)

Arsenopyrite in Quartz Matrix

Arsenopyrite (FeAsS) with Quartz (SiO2)

Amethyst

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

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Prehnite

Prehnite, Ca2Al2Si3O10(OH)2

Citrine

SiO2 (Silicon Dioxide)

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)

Chert (microcrystalline quartz)

Dearest Jewelry (Multigemstone)

Combination of Diamond (C), Emerald (Be3Al2Si6O18), Amethyst/Rock Crystal (SiO2), Ruby (Al2O3), Emerald (Be3Al2Si6O18), Sapphire (Al2O3), and Topaz (Al2SiO4(F,OH)2)

Demantoid Garnet on Matrix

Demantoid (variety of Andradite Garnet) - Ca3(Fe3+)2(SiO4)3

Green glass sphere/marble

Soda-lime glass (primarily SiO2, Na2O, CaO)

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Amber (Black)

Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Blue Quartzite

Quartzite (specifically a variety enriched with blue-coloring minerals)

Chert (varietal known as Jasper or Flint)

Silicon Dioxide (SiO2)

Chalcedony or Chert/Jasper with secondary mineral staining

SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Biological Bone (Patella/Knee)

Patella (part of the Human Skeletal System)

Goldstone (Red)

Aventurine Glass

Garnet Beads

Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)

Sandstone

Quartz Arenite (a type of sandstone composed of more than 90% quartz)

Sandstone (likely a river or beach pebble)

Sandstone (a clastic sedimentary rock)

Sodalite (blue beads) and Clear Quartz (clear beads)

Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2

Chert (Flint)

Chert (predominantly SiO₂ - silicon dioxide)

Diamond

Diamond (pure carbon, C)

Chrysoprase

Chalcedony (cryptocrystalline quartz) with nickel inclusions; SiO2

Corundum

Corundum (Al2O3)

Ferruginous Sandstone

Sandstone, Iron-rich

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

Serpentine

Serpentine Group Minerals (e.g., Antigorite, Chrysotile, Lizardite)