This Is Not A Rock Or Mineral

Crazy Lace Agate

Banded Chalcedony (Microcrystalline Quartz, SiO2)

Wonderstone (Sandstone)

Liesegang Banded Sandstone (SiO2 dominated)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Amethyst and Ruby in Zoisite

Silicon Dioxide (SiO2) and Anyolite (Zoisite-Hornblende-Ruby mix)

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (70–75% SiO2)

Serpentine

Serpentinite (group of minerals including Antigorite, Lizardite, or Chrysotile) (Mg, Fe)3Si2O5(OH)4

Schist

Mica Schist (Group of medium-grade metamorphic rocks)

Basalt with Scoria/Vesicular Texture

Vesicular Basalt (Iron-rich/Oxidized)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, or Chrysotile)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Quartz Geode/Druzy Quartz

Quartz (SiO₂)

Jasper

Silicon dioxide (SiO2)

Sandstone Clast

Arenite (primarily SiO2)

Sandstone (Ferruginous/Red Sandstone)

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Sandstone (specifically Arkose or Ferruginous Sandstone)

Sandstone (SiO2 with iron oxide inclusions)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3/FeO(OH) cement)

Pink Dyed Agate (Pink Agate Slice)

Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Granite (White Granite variant)

Phaneritic Plutonic Rock (High-silica Felsic)

Jasper

Silicon Dioxide (SiO2)

Shale with Plant Fossils / Carbonaceous Shale

Laminated Mudrock (Siliciclastic)

Geode (Unopened)

Siliceous Septarian Concretion / Geode (SiO2)

Pink Quartzite

Quartzite (SiO2 with minor iron oxide impurities)

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Quartzite with Iron Hydroxide Staining

Quartzite (primarily SiO2) with Limonite/Goethite staining

Quartz

Silicon Dioxide (SiO₂)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Granite

Phaneritic Plutonic Rock (High Silica content)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (SiO2 primary composition)

Blue Quartzite

Quartzite (primarily SiO2 with inclusions)

Greenschist (Greenstone)

Greenschist (Metamorphic rock containing chlorite, actinolite, and epidote)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Chert (Hagstone/Adder Stone)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Rose Quartz

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

Gneiss (likely)

Gneiss

Druzy Quartz on Matrix

Silicon Dioxide (SiO2)

Quartz Crystal (specifically Rock Crystal)

Silicon Dioxide (SiO2)

Amethyst Quartz

Silicon Dioxide (SiO2 with iron impurities)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)