Synthetic Or Natural Fiber

Granite

Granite

Milky Quartz

Silicon Dioxide (SiO2)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous Phosphate of Copper and Aluminum)

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Black Tourmaline (Schorl)

Sodium Iron Aluminum Borosilicate (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Turquoise (Green variety)

Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Druzy Quartz

Quartz (Silicon Dioxide, SiO2)

Yellow Quartz Pebble (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Citrine Geode (or Druzy Citrine)

Silicon Dioxide (SiO₂) - a variety of Quartz

Black Tourmaline

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

Citrine Quartz

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

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Rose Quartz

Silicon Dioxide (SiO2) with trace impurities of Titanium, Manganese, or Iron

Turquoise

Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O

Kaolinite (Chalky Clay)

Kaolinite (Al2Si2O5(OH)4)

Orange Quartz with Hematite inclusions

Quartz (SiO2) with Hematite (Fe2O3) inclusions

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium) - CuAl6(PO4)4(OH)8·4H2O

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Gold Nugget

Native Gold (Au)

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

Turquoise

Hydrous phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)

Citrine

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

Ruby

Corundum (Al2O3 with Chromium traces)

Carnelian and White Quartz Bracelet

Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz

Pearl

Calcium Carbonate (CaCO3) in the form of orthorhombic Aragonite and Conchiolin

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Diamond

Carbon (C)

Turquoise

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

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Citrine

Quartz (SiO₂) variety

Azurite-Malachite (often called Azerite Malachite or Azurmalachite)

Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)

Green Glass Cullet / Recycled Glass

Amorphous Silicon Dioxide (SiO2) with various metal oxides

Diamond

Diamond (C)

Amethyst (as part of a multi-stone bracelet)

Silicon Dioxide (SiO2) with iron impurities

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O

Tektite (Indochinite)

Tektite (High-silica natural glass, primarily SiO2 with Al2O3)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Granite

Granite (Felsic intrusive igneous rock)

Bivalve Shell (Fossil or Contemporary)

Class Bivalvie (various genera and species of clams, cockles, etc.)

Shale

Shale (fine-grained clastic sedimentary rock)

Druzy Quartz Geode (likely Smokey Quartz variety)

Silicon Dioxide (SiO2) - specifically a geode formation lined with druzy quartz crystals, with a likely brownish hue indicating smokey quartz.

Obsidian

Obsidian (volcanic glass, amorphous silica rich rock)