Rock

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Dyed Agate Geode (Pink/Magenta)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Milky Quartz with Chlorite/Mica inclusions

Silicon Dioxide (SiO2) with inclusions

Sandstone (Ferruginous)

Arenite (Fe2O3 stained)

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Ferruginous Sandstone (ironstone)

Sandstone with iron oxide cement (limonite/hematite)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Granite Cobble

Felsic Intrusive Igneous Rock (Granite)

Geode with Quartz Crystal Cavity

Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix

Granitoid (Granite/Diorite)

Course-grained Plutonic Igneous Rock

Script Jasper

Silicon Dioxide (SiO2) with impurities

Jasper with Hematite inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Mookaite Jasper

Silicified Radiolarite (SiO2)

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Quartz-Veined Mudstone

Argillaceous Mudstone with Quartz Veining

Sandstone (likely Arkosic or Lithic Sandstone)

Arenite (SiO2 based with mineral inclusions)

Iron-Stained Quartzite

Quartzite (chemically SiO2 with Fe2O3/FeO(OH) staining)

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Leopard Skin Jasper

Jasper (Silicon Dioxide with impurities), SiO2

Snowflake Obsidian

Volcanic Glass (spherulitic obsidian)

Sandstone (Quartzose)

Arenite (SiO2 based)

Apache Tear

Hydrated Obsidian (Volcanic Glass)

Sandstone

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Granite Pebble

Granite (Felsic Plutonic Rock)

Pink Granite Porphyry Cobble

Porphyritic K-Feldspar Granite

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Rose Quartz

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

Jasper or Chalcedony

Microcrystalline Quartz (SiO2)

Jasper with Quartz inclusions

Silicon Dioxide (SiO2)

Carnelian Agate (with Quartz/Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Vesicular Basalt

Aphanitic Mafic Igneous Rock (with Vesicular Texture)

Clear Quartz Crystal

Quartz (Silicon Dioxide - SiO2)

Jasper (specifically Yellow or Bumblebee-like Jasper)

Silicon Dioxide (SiO2) with impurities

Basalt Pebble

Basalt (Mafic Volcanic Rock)

Vesicular Basalt

Aphanitic Mafic Volcanic Rock

River Pebble (Gravel Pebble)

Stream-rounded Rock / Siliciclastic Pebble

Sandstone (Quartzose Sandstone)

Arenite (SiO2 based)