Synthetic Glass (Often Categorized As A Simulated Mineral)

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)

N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)

Pegmatite with Mica

Granitic Pegmatite (containing Muscovite and Biotite)

Clear Quartz

Silicon Dioxide (SiO2)

Tumbled amber-colored mineral or glassy pebble

Uncertain; likely chalcedony/quartz, possibly resinous amber or slag glass

Chert Concretion (Flint)

Silicon Dioxide (SiO2)

Quartz / Common Opal

Silicon Dioxide (SiO2)

Quartz Crystal with Inclusions

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within metamorphic/igneous matrix

Citrine Quartz

Silicon Dioxide (SiO2) with trace Iron impurities

Quartz / Common Opal Transition

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions

Quartz (Smoky/Brown variety)

Silicon dioxide (SiO2)

Faceted yellow gemstone ring

Likely yellow sapphire (corundum), but exact identification requires testing; alternatives include citrine, chrysoberyl, or treated diamond.

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (mostly SiO2)

Mica (Muscovite)

Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Cubic Zirconia (CZ)

Cubic Zirconium Dioxide (ZrO2)

Quartzite with inclusions

Quartzite

Quartz

Silicon Dioxide (SiO2)

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Obsidian

Obsidian (Volcanic Glass)

Cut colorless gemstone, likely quartz or glass imitation

Most plausibly rock crystal (clear quartz, SiO₂); synthetic glass cannot be ruled out from the image

Quartz with Muscovite Mica

SiO2 with KAl2(AlSi3O10)(OH)2

Bull Quartz with Mica and Host Rock

Massive Quartz (SiO2) with Muscovite/Chlorite inclusions

Diamond (faceted)

Diamond (Pure Carbon, C)

River Quartzite Slik

Quartzite (SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Synthetic Zinc/Polycarbonate Composite (Bey-specimen)

Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Slag Glass (Cullet Glass)

Amorphous Silica (Industrial byproduct)

Pyrite in Quartz

FeS2 (Iron Pyrite) with SiO2 (Quartz)

Quartz Drusy on Matrix

Silicon Dioxide (SiO2)

Peach Aventurine

Quartz variety (SiO2 + Hematite/Goethite inclusions)

Quartz with Iron Oxide Inclusions

SiO2 with Fe2O3 impurities

Citrine or Yellow Quartz

Silicon Dioxide (SiO2) with iron impurities

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Glass or Slag Glass

Amorphous Silica (Anthropogenic Glass)

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3/FeO(OH))

Quartz pebble

SiO2