Man Made Mineral Simulant (Glass)

Strawberry Quartz and Rose Quartz

Silicon Dioxide (SiO2) with inclusions

Quartz Pebble

Silicon Dioxide (SiO2)

Rose Quartz

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

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (likely Graywacke or Arkosic varieties)

Arenite (composed primarily of SiO2)

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Cream Quartz Bead

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (specifically Milky Quartz Pebble)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Quartz Pebble

Silicon Dioxide (SiO2) with host rock matrix

Green Aventurine

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Green Aventurine

Silicon Dioxide (SiO2) with Chromium-bearing Fuchsite

Aventurine

Aventurine (Silicon Dioxide with Fuchsite inclusions) - SiO2

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if the grainy texture is rock-wide

Quartz (Rose/Pink variety)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Geode fragment, likely quartz-lined basalt or chalcedony nodule

Microcrystalline quartz (SiO₂), possibly with iron-oxide staining in a basaltic host

Translucent agate/chalcedony

Microcrystalline quartz (SiO₂), likely chalcedony with agate-like banding

Tumbled brown stone, likely smoky quartz or brown jasper

Probable smoky quartz (SiO₂) or iron-rich jasper (microcrystalline SiO₂); image alone is insufficient for certainty

Tumbled blue stone, likely blue aventurine or dyed quartzite

Quartz (SiO₂), likely with inclusions or artificial dye; exact identification requires testing

Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Likely obsidian (possibly tektite or slag glass)

Volcanic glass; primarily SiO₂, noncrystalline

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Tumbled banded calcite (often sold as “onyx” or green onyx)

Calcite, CaCO₃; commonly banded cave/travertine calcite

Clear Quartz

Silicon Dioxide (SiO2)

Quartz-rich pegmatite or quartz vein rock

Mostly quartz (SiO₂), with probable feldspar and iron-oxide staining

Quartz

Silicon Dioxide (SiO2)

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Aventurine

Aventurine Quartz

Mahogany Obsidian

Volcanic Glass with Hematite inclusions (SiO2 + Fe2O3)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Mica in Quartz Host

Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)