Sedimentary And Igneous

Pyrite

Iron Sulfide (FeS2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Yellow Chalcedony (likely carnelian or yellow agate)

Silicon Dioxide (SiO₂)

Wonderstone (Banded Rhyolite)

Rhyolite (Silicon Dioxide with Iron Oxide impurities)

Granite Cobble

Phaneritic Felsic Igneous Rock (Granite)

Granite (Dioritic or Hornblende-rich)

Phaneritic Plutonic Felsic to Intermediate Igneous Rock

Green Moss Agate / Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron and Manganese inclusions

Jasper (specifically Bloodstone or Heliotrope variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Quartz Pebble

Crystalline Silica (SiO2)

Pyrite

Iron Disulfide (FeS2)

Quartz

Silicon Dioxide (SiO2)

Orange Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Gneiss

Metamorphic Gneiss

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Feldspathic Gneiss

High-grade Metamorphic Rock (Gneiss)

Gneiss

Gneiss

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Quartz (Iron-stained or Chalcedony varieties)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Green Fluorite

Calcium Fluoride (CaF2)

Gneiss

Gneiss

Gneiss

Gneiss (Metamorphic rock dominated by Quartz, Feldspar, and various dark minerals)

Gneiss

High-grade metamorphic rock (Gneiss)

Gneiss

Gneiss

Carnelian / Chalcedony

Cryptocrystalline Quartz (SiO2)

Gneiss

Gneiss

Greenstone / Graywacke

Metagraywacke or Chlorite Schist

Gneiss

Gneiss

Quartz (specifically Milky/White Quartz)

Silicon Dioxide (SiO2)

Gneiss (foliated metamorphic rock)

Gneiss

Gneiss

Gneiss

Specular Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Graphite

Graphite (Chemical Formula: C)

Feldspar

KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8

Gneiss

Gneiss (Metamorphic Rock)