Igneous And Mineral

Quartz (beads)

SiO2 (Silicon Dioxide)

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock with secondary mineral infilling)

Amethyst Quartz

Amethyst (Silicon Dioxide, SiO2)

Snowflake Obsidian

Vitreous Volcanic Rock (Amorphous Silicate), SiO2

Pink Granite

Granite (High K-Feldspar variety)

Basalt with Vesicular Surface

Basalt (Mafic Extrusive)

Obsidian

Obsidian (Volcanic Glass, SiO2)

Granite

Phaneritic Plutonic Felsic Rock (major components: SiO2 and Al2O3)

Schorl (Black Tourmaline) in Quartz or Feldspar Matrix

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl) in Granitic Pegmatite

Milky Quartz with Country Rock contact

Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock

Obsidian

Volcanic Glass (Amorphous Silica)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Greenschist

Greenschist (Chlorite-actinolite schist)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Opal

Hydrated Silica (SiO2·nH2O)

Clear Quartz Fragment

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Diorite

Phaneritic Intermediate Igneous Rock

Red Granite

Phaneritic Felsic Igneous Rock

Pegmatite

Granitic Pegmatite

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

Labradorite

Labradorite (Plagioclase Feldspar Series: (Ca,Na)(Al,Si)4O8)

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Diamond in Kimberlite

Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Sunstone

Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Vesicular Basalt (Lava Rock)

Aphanitic Mafic Igneous Rock

Porphyritic Basalt or Diabase with Plagioclase Phenocrysts

Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar

Gold and Diamond

Native Gold (Au) and Diamond (C)

Moonstone

Orthoclase (KAlSi3O8), specifically the variety showing adularescence

Aquamarine (Rough)

Beryl (Be3Al2Si6O18)

Blue Chalcedony

Silicon Dioxide (SiO2)

Snowflake Obsidian

Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)

Clear Quartz

Silicon Dioxide (SiO2)

Blue Calcite (commonly sold as Caribbean Calcite)

Calcium Carbonate (CaCO3)

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)