Pyrite
Iron Sulfide (FeS2)
mineral
Category
Sedimentary Or Igneous
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Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Gneiss (with Quartzite layers)
Gneissic Metamorphic Rock
metamorphic
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss with Quartz/Feldspar Vein
Quartz-Feldspathic Gneiss
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Milky or Rough Quartz)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (Silica, SiO2)
mineral
Botryoidal Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Gneiss
Gneiss
metamorphic
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
sedimentary or metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Basalt River Stone
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Red Quartz (Carnelian/Red Jasper Agate)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Granite
Granite (Phaneritic Igneous Rock)
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Blue Quartz (Blue Chalcedony/Dumortierite Quartz)
Silicon Dioxide (SiO2) with inclusions (typically Dumortierite Al7(BO3)(SiO4)3O3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
metamorphic
Banded Agate (Jasper-Agate)
Silicon Dioxide (SiO₂)
Mineral
Chalcedony (Carnelian Agate pebble)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade regional metamorphic rock)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Gneiss
Gneiss
metamorphic
Gneissic River Pebble
Gneiss
metamorphic
Granite Gneiss with Garnet
Garnetiferous Gneiss
metamorphic
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral