Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)

Druzy Quartz on Host Rock

Silicon Dioxide (SiO2) with various iron-oxide inclusions

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)

Graphic Granite (Zebra Rock)

Pegmatitic Granite (composed of Quartz and K-Feldspar)

Peridot and Citrine Gemstones (in a ring setting)

Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)

Quartz on Matrix

Silicon Dioxide (SiO2)

Blue Quartzite (Aventurine)

Quartzite (primarily SiO2) with inclusions of Dumortierite or Magnesio-riebeckite

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz and Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

Diorite

Diorite (Intermediate intrusive igneous rock)

Scoria (Vesicular Basalt)

Vesicular Basalt

Peridot

Olivine (specifically, the gem-quality variety forsterite, (Mg,Fe)2SiO4)

Quartz in Matrix (possibly with Biotite or Hornblende)

Quartz (Silicon Dioxide, SiO2) in Granitic Matrix

Quartz (Pebble)

Quartz (SiO₂)

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Basalt

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Basalt (River Cobble)

Mafic Igneous Basalt (composed primarily of Plagioclase feldspar, Pyroxene, and Olivine)

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO₂)

Aura Quartz (Titanium Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti)

Dumortierite Quartz

Dumortierite (Al7BO3(SiO4)3O3 / inclusion in SiO2)

Yellow Apatite Sphere (Polished)

Fluorapatite / Ca5(PO4)3F

Sandstone (Red)

Arenite (primarily Quartz, SiO2, with Iron Oxide cement)

Pyrite

Iron Pyrite (FeS2)

Quartz Pebble

Silicon Dioxide (SiO2)

Greenschist

Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)

Smoky Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock with secondary mineral infilling)

Smoky Quartz

Silicon Dioxide (SiO2)

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)

Granite

Felsic Intrusive Igneous Rock (SiO2, Al2O3, K2O, Na2O)

Quartzite

Quartzite (primarily SiO2)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Garnet Beads

Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Diorite

Diorite (Intermediate intrusive igneous rock)

Granite

Phaneritic Plutonic Rock (Granite)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)