Organic (Non Rock)

Conglomerate

Conglomerate (Clastic sedimentary rock)

Muscovite Mica (with Quartz)

Muscovite (KAl2(AlSi3O10)(OH)2)

Thunderegg (Agate-filled Geode Node)

Silicon dioxide (SiO2) with various inclusions

Basalt

Basalt (Mafic volcanic rock)

Basalt

Extrusive Mafic Igneous Rock

Vesicular Basalt

Vesicular Basalt (Aphanitic Mafic Igneous Rock)

Basalt (Vesicular)

Basalt (Mafic Extrusive Igneous Rock)

Basalt (with possible quartz veinsing)

Basalt

Sandstone Concretion

Clastic Sedimentary Concretion (primarily SiO2 with Fe2O3 cement)

Quartzite (River Pebble)

Metamorphic Quartzite (SiO2)

Sandstone (likely Arkosic or Quartzose)

Sandstone (SiO2 dominated)

Sandstone (Ferruginous)

Arenite with Iron Oxides

Basalt

Extrusive mafic igneous rock

Granite

Granite (Felsic Plutonic Rock)

Rose Quartz

Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Sandstone

Arenite (composed primarily of SiO2)

Ferruginous Sandstone (Gerrit)

Arenite with Iron Oxide cementation

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Scoria

Scoria (Vesicular Basalt)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Tumbled Carnelian and Quartz Mix

Silicon Dioxide (SiO2) with iron oxide impurities

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz Cluster

Silicon Dioxide (SiO2)

Citrine

Citrine (Silicon Dioxide, SiO2)

Red Jasper

Silicon Dioxide (SiO2) - variety Jasper

Clear Quartz

Crystalline Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Chert Conglomerate (or Breccia)

Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)

Sandstone

Arenite (predominantly SiO2)

Specular Hematite

Iron Oxide (Fe2O3)

Red Quartzite / Jasper-rich Pebble

Quartzite (primarily SiO2 with hematite inclusions)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Quartz (River Cobble)

Silicon Dioxide (SiO2)

Quartz (specifically Quartzite or Massive Quartz)

Silicon Dioxide (SiO2)

Citrine (Heat-treated or Natural Quartz)

Silicon Dioxide (SiO2)

Jasper with Quartz

Silicon Dioxide (SiO2) - Chalcedony variety

Carnelian

Chalcedony (Silicon Dioxide, SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite (primarily Quartz, SiO2)

Chert (Nodular Chert)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)