Quartz

Quartz Vein in Mica Schist

Quartz (SiO2) with Muscovite/Biotite Schist

White Quartz Beads

Silicon Dioxide (SiO2)

Yellow Quartz / Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Vein in Basalt or Sedimentary Host Rock

Silica-veined lithic fragment (SiO2 in host matrix)

Quartz with Iron Stains

Silicon Dioxide (SiO2) with FeOx inclusions

Quartz with Mica inclusions (Gold-colored Mica)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (Phlogopite/Muscovite) inclusions

Quartz (Vein Quartz / Milky Quartz)

Silicon Dioxide (SiO2)

Quartz with Iron Inclusions

Silicon Dioxide (SiO2) with Hematite or Limonite staining

Faceted brown gemstone ring, likely smoky quartz

Quartz (SiO₂), possibly smoky quartz; identification from the photo is uncertain

Quartz with Mica (Muscovite/Biotite)

Silicon Dioxide (SiO2) with Phyllosilicate inclusions

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz-rich rock fragment, possibly milky quartz or quartzite

Quartz (SiO₂), or quartzite if the grains are fused

Clear Quartz / Diamond (untested)

Silicon Dioxide (SiO2) or Carbon (C)

Faceted Clear Quartz or Diamond Simulant

Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Milky Quartz/Yellow Quartz

Silicon Dioxide (SiO2)

Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)

Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)

Gold-bearing Quartz

Native Gold (Au) in Quartz (SiO2) matrix

Faceted colorless gemstone, likely quartz (rock crystal) or synthetic glass imitation

Quartz: silicon dioxide (SiO₂), trigonal crystal system; exact identity cannot be confirmed visually

Tumbled honey-colored quartz (likely iron-stained quartzite)

Quartz, silicon dioxide (SiO₂); possibly quartz-rich quartzite

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Rough Diamond / Clear Quartz

C (Carbon) or SiO2 (Silicon Dioxide)

Gold in Quartz

Hydrothermal Quartz with Native Gold (SiO2 with Au)

Sandstone with Quartz Vein

Quartzose Sandstone with Hydrothermal Quartz

Smoky quartz ring

Quartz (SiO₂), likely smoky quartz; the surrounding stones and metal cannot be identified reliably from the image.

Mixed tumbled stones, likely rose quartz and purple quartz/amethyst

Quartz (SiO₂), including amethyst and probable rose quartz; exact identification is uncertain from the blurred image

Quartz Geode Fragment with Iron Staining

Silicon Dioxide (SiO2)

Multi-gemstone Quartz and Fluorite Bracelet

Silicon Dioxide (SiO2) and Calcium Fluoride (CaF2)

Gold Ore (in Quartz/Sulfide matrix)

Native Gold (Au) in Quartz (SiO2) and Pyrite (FeS2)

Tumbled quartz-like pebble

Quartz (silicon dioxide, SiO₂), possibly iron-stained chalcedony

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Iron-stained Quartz

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Tumbled quartz (likely rose quartz and milky quartz)

Quartz, silicon dioxide (SiO₂)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Tumbled blue quartz (likely dumortierite quartz)

Quartz, SiO₂, colored blue by dumortierite inclusions

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Quartz-bearing metamorphic rock, likely quartzite or hornfels

Quartz (SiO₂) in a fine-grained silicate matrix; exact rock identification requires testing

Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz in Matrix (Pegmatite)

Silicon Dioxide (SiO2) with Potassium Feldspar and Biotite mica

Chert Arrowhead and Quartz Specimen

Silicon Dioxide (SiO2)