Sedimentary Or Igneous Fragment

Quartz

Quartz (SiO₂)

Quartz

Quartz (SiO₂)

Gneiss (Metamorphic Rock)

Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Quartz

Silicon dioxide (SiO2)

Porphyry (Flower Stone)

Porphyry (Andesite or Basalt matrix)

Aquamarine

Beryl (Be3Al2Si6O18), specifically the blue-green variety

Black Obsidian and Hematite

Volcanic Glass (SiO2) and Hematite (Fe2O3)

Garnet

Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)

Clear Quartz (beads in a bracelet)

Quartz (SiO2)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins)

Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)

Black Chert

Chert (microcrystalline quartz)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Quartz

Silicon Dioxide (SiO₂)

Quartz (likely a clear or rock crystal variety)

Quartz (SiO2 - Silicon Dioxide)

Quartz

Quartz (Silicon Dioxide - SiO2)

River Stone (Basalt or Siltstone)

Mafic Volcanic Rock or Clastic Sedimentary Rock

Quartz (vein quartz)

SiO2 (Silicon Dioxide)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Gneiss

Gneiss

Green Aventurine and Clear Quartz

Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)

Biotite Mica

Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2

River Pebble (Basalt/Greywacke)

Weathered Basalt or Fine-Grained Greywacke

Pyrite

Pyrite (Iron Disulfide), FeS2

Quartz

Silicon dioxide (SiO₂)

Pebble (Likely Basalt or Siltstone)

Clastic sedimentary rock or mafic volcanic rock

Milky Quartz

Quartz (SiO2)

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Quartz Pebble

Silicon Dioxide (SiO2)

River Pebbles and Quartz

Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)

Graphite

Graphite (Carbon, C)

Pink Opal / Peruvian Opal

Hydrated amorphous silicon dioxide (SiO2·nH2O)

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Gneiss (specifically a Banded Gneiss pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Gold (Processed)

Gold (Au)

Quartz (in matrix)

Quartz (SiO₂)

Weathered Volcanic Rock (possibly Rhyolite or Andesite Pebble)

Volcanic rock (e.g., Rhyolite or Andesite, specific identification would require thin section analysis or chemical assay). Mineral composition: Primarily feldspars (orthoclase and/or plagioclase), quartz (in rhyolite), micas, amphiboles, and sometimes pyroxenes.

Crystal Quartz Beads (likely Clear Quartz)

Quartz (SiO₂)