Mineral (Processed Metal)

Petrified Wood

Silicified wood (primarily Silicon Dioxide - SiO2)

Efflorescence (on Clay Brick)

Crystalline salt deposits (typically Sodium Sulfate Na2SO4, Calcium Carbonate CaCO3, or Potassium Sulfate K2SO4)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

Shell Cameo (Sardonyx Shell)

Cassis madagascariensis (Sardonyx shell)

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

Quartz (SiO₂ - Silicon Dioxide)

Agate (specifically, likely a geode slice or nodule)

Agate (a variety of Chalcedony, with chemical formula SiO2)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Slate

Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.

Gneiss

Gneiss (a metamorphic rock)

River Cobble (likely Sandstone or Siltstone type)

Sandstone or Siltstone (common rock types that form river cobbles)

Sandstone

Sandstone (lithified arenite/wacke)

Pyrite

Pyrite (Iron sulfide, FeS₂)

Gneiss

Gneiss (a type of metamorphic rock)

Turquoise (beads)

Turquoise; CuAl6(PO4)4(OH)8·4H2O

Quartz (likely milky quartz or a stained variety)

Silicon Dioxide (SiO₂)

Pyrite

Pyrite (FeS2)

Garnet (Almandine or Spessartine likely)

Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)

Diamond

Carbon (C), specifically in an isometric crystal system.

Peridot (Olivine)

Olivine ((Mg,Fe)2SiO4)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Granite

Granite (a common igneous rock)

Laterite (iron-rich nodule, possibly Bauxite as a subtype)

Laterite (composed of various minerals including goethite, hematite, gibbsite, etc.)

Conglomerate

Conglomerate (a clastic sedimentary rock)

Mixed Gemstone Bracelet

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

Banded Gneiss

Gneiss (pronounced "nice")

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)

Jade (Nephrite or Jadeite)

Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 (amphibole mineral); Jadeite: NaAlSi2O6 (pyroxene mineral)

Citrine

Quartz (SiO₂) variety

Basalt

Basalt (extrusive igneous rock)

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Unakite

Epidote-Feldspar rock

Anthracite Coal

Anthracite (a variety of coal, predominantly carbon)

Chalcedony

Chalcedony (SiO₂)

Strawberry Quartz

Quartz (SiO₂) with Goethite (α-FeO(OH)) and/or Lepidocrocite (γ-FeO(OH)) inclusions

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Quartz

Quartz (SiO₂)

Diamond

Diamond (C)

Aragonite (variety 'Flos Ferri')

Aragonite (CaCO3)