Igneous And Sedimentary Mixture

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8)

River Pebble (Basalt/Greywacke)

Weathered Basalt or Fine-Grained Greywacke

Pyrite

Pyrite (Iron Disulfide), FeS2

Quartz

Silicon dioxide (SiO₂)

Yellow Quartz

Silicon Dioxide (SiO2)

Quartz (Water-worn pebble)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Citrine

Silicon Dioxide (SiO2) - Yellow Quartz variety

Quartz Pebble (Sea Glass-like Quartz)

Quartz (Silicon Dioxide - SiO2)

Pebble (Likely Basalt or Siltstone)

Clastic sedimentary rock or mafic volcanic rock

Milky Quartz (with trace inclusions)

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Carnelian

Carnelian (variety of Chalcedony, 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).

River Pebbles and Quartz

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

Chert (Yellow Jasper)

Silicon Dioxide (SiO2)

Pyrite in Shale

Iron Disulfide (FeS2) in Argillaceous Shale

Jasper or Agate-bearing Chert

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Graphite

Graphite (Carbon, C)

Pink Opal / Peruvian Opal

Hydrated amorphous silicon dioxide (SiO2·nH2O)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Amethyst

Amethyst (Silicon Dioxide - SiO2)

Citrine

Citrine (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Yellow Quartz (Citrinated Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)

Native Copper within Host Rock

Native Copper (Cu)

Purple Chalcedony (likely dyed Agate)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Chakra Tumbled Stone Set

Various (including Amethyst [SiO2], Sodalite [Na8(Al6Si6O24)Cl2], Green Aventurine [SiO2], Red Jasper [SiO2], etc.)

White Quartz Pebble

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)