Metamorphic Or Igneous With Mineral Inclusion

Quartz Vein in Gneiss or Basalt

Milky Quartz (SiO2) within Metamorphic Host Rock

Quartz Pebble with Epidote / Chlorite Inclusions

Silicon Dioxide (SiO2) with Epidote/Chlorite inclusions

Blue Aventurine

Quartz (SiO2) with inclusions

Yellow Aventurine

Quartz (Silicon Dioxide, SiO2) with inclusions

Aventurine (Green Aventurine)

Silicon Dioxide with Fuchsite inclusions (SiO2)

Yellow Aventurine (specifically a carved crescent moon)

Silicon Dioxide (SiO2) with inclusions

Green Aventurine

Quartz with Fuchsite inclusions (SiO2)

Blue Quartz (Dumortierite Quartz)

SiO2 with inclusion of AlAl6BSi3O18

Natural Gemstone Cabochons (Ruby, Moonstone, Emerald, Citrine)

Ruby (Al2O3:Cr), Moonstone (KAlSi3O8), Emerald (Be3Al2(SiO3)6:Cr), Citrine (SiO2)

Orange Aventurine (or Tumbled Carnelian)

Quartz (SiO2) with inclusions

Quartz with Sulfide Inclusions

Silicon Dioxide (SiO2) with metallic mineral inclusions

Yellow Aventurine

Quartz with inclusion minerals (SiO2)

Basalt with Peridotite Xenolith

Mafic Igneous Rock with Peridotite Inclusion (Olivine-rich)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz with Magnetite or Schorl inclusion

Silicon Dioxide (SiO2) with Fe3O4 or NaFe3(Al6)(BO3)3Si6O18(OH)4

Orange Aventurine / Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Basalt with Amygdule

Aphanitic Mafic Volcanic Rock (Basalt) with Zeolite/Quartz Infill

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Tumbled pale green quartz (likely aventurine or common quartz)

Quartz, silicon dioxide (SiO₂); green color may result from fuchsite or chlorite inclusions

Blue Quartz (or Blue Aventurine)

Silicon Dioxide (SiO2) with inclusions (typically Crocidolite or Dumortierite)

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite

Quartz with Schorl inclusions

Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate Hydroxide (Black Tourmaline)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Dumortierite Quartz

Dumortierite-bearing Quartz (SiO2 with Al7BO3(SiO4)3O3)

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Unidentified small mineral specimen

Indeterminate from the photograph; it may be a light-colored quartz- or feldspar-rich rock with a dark mineral inclusion.

Quartz Pebble (Iron-Stained)

Silicon Dioxide (SiO2)

Chlorite (Small Flakes/Sand)

Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Small tumbled quartz pebble

Quartz (silicon dioxide, SiO₂), possibly iron-stained milky quartz

Rounded quartz-rich pebble, likely milky quartz with iron-oxide inclusions

Quartz (SiO₂), possibly with minor chlorite or iron/manganese oxides

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2)

Basalt with Quartz Infill

Basalt (Mafic Extrusive Volcanic Rock)

Green Aventurine

Quartz variety (SiO2 with inclusions of Fuchsite)

Green Aventurine

SiO2

Sunstone

Oligoclase or Andesine (Feldspar Group), (Ca,Na)((Al,Si)4O8)

Ruby

Corundum (Al2O3)

Quartz-bearing granite or pegmatite fragment

Likely granitic material composed mainly of quartz (SiO₂), feldspar, and possibly biotite or hornblende

Smoky Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Auriferous Quartz or Pyritic Ore

Iron Pyrite (FeS2) or Native Gold (Au) in Matrix

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)