Igneous

Obsidian (likely Golden Sheen Obsidian or Rainbow Obsidian, given the subtle sheen visible on some beads)

Obsidian (volcanic glass, predominantly SiO2 with various impurities)

Obsidian

Obsidian (Amorphous volcanic glass, SiO2 with impurities)

Granite

Granite (primarily Quartz, Feldspar, and Mica)

Basalt (Vesicular)

Basalt (Extrusive Volcanic Rock)

Basalt with Iron Oxidation (Lattice/Veined)

Mafic Volcanic Rock (principally Plagioclase and Pyroxene)

Porphyry

Porphyritic Andesite/Basalt

Diorite (Salt and Pepper Rock)

Phaneritic Plutonic Diorite; chemical composition roughly 52-63% silica (SiO2)

Basalt

Aphanitic mafic volcanic rock (primarily plagioclase feldspar and pyroxene)

Vesicular Basalt (Amygdaloidal)

Vesicular Basalt (Fe-Mg rich extrusive volcanic rock)

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Obsidian

Volcanic glass (high silica volcanic rock)

Diorite (Porphyritic)

Porphyritic Diorite

Porphyritic Basalt (Chinese Writing Stone)

Porphyritic Basalt or Porphyritic Andesite

Granite River Pebble

Phaneritic Granite (primarily Quartz, Feldspar, and Mica)

Granite (Alkali-feldspar Granite)

Felsic Plutonic Rock (Primary minerals: Quartz SiO2, Orthoclase KAlSi3O8, Plagioclase (Na,Ca)AlSi3O8)

Granite

Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Indigo Gabbro

Gabbro (Mafic Intrusive Rock)

Granite Pebble

Granite

Granite

Granite (Felsic Plutonic Rock)

Basalt (Vesicular/Amygdaloidal or Water-Worn)

Basalt

Crushed Granite Gravel

Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase Feldspar)

Red Porphyry

Porphyritic Andesite or Rhyolite

Granite

Plutonic felsic rock (Quartz, Feldspar, Mica)

Granite

Granite

Granite

Phaneritic plutonic felsic rock (Quartz, Feldspar, Mica)

Basalt (River Stone)

Basalt

Granite

Granite (Alkali-feldspar, Quartz, and Plagioclase)

Basalt (Water-worn Pebble)

Basalt (Mafic volcanic rock)

Pumice

Pumice (a highly vesicular, silicic volcanic rock)

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase Feldspar)

Pink Granite

Granite (Phaneritic intrusive rock)

Rainbow Obsidian

Volcanic glass (SiO2 - approximately 70% or more silicon dioxide)

Granite

Granite (Felsic Plutonic Rock)

Obsidian

Obsidian (volcanic glass; primarily SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Extrusive volcanic rock)

Apache Tear

Obsidian (Hydrated Volcanic Glass)

Apache Tear

Obsidian (Hydrated Volcanic Glass) - SiO2 (with impurities)

Basalt

Basalt (Mafic volcanic rock)

Granitic Pegmatite

Phaneritic Granite with Potassium Feldspar (KAlSi3O8), Quartz (SiO2), and Plagioclase

Peridotite (with Olivine and Pyroxene)

Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)

Mica in Quartz Host

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

Granite

Granite (High-silica plutonic rock)