Metamorphic (Altered Igneous Rock)

Shatter Cone

Impactite (Shatter Cone texture)

Quartz (Milky/Crystalline fragment)

Silicon Dioxide (SiO2)

Ocean Jasper

Orbicular Jasper / Silicate

Quartzite

Metamorphic Quartz (SiO2)

Basalt River Cobble

Basalt (Mafic volcanic rock)

Basalt

Basalt (Mafic volcanic rock)

Quartzite

Metamorphic Rock (Mainly SiO2)

Quartz

Quartz (SiO2, Silicon Dioxide)

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Quartz

Silicon dioxide (SiO2)

Ruby in Zoisite with Hornblende

Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))

Quartzite

Quartzite (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Schist

Mica Schist (Metamorphic Rock)

Quartzite Pebble (with Iron Inclusions)

Metamorphic Rock (Mainly SiO2)

Quartzite

Metamorphic Rock (Mainly SiO2)

Pink Quartzite

Silica (SiO2) - Metamorphic rock

Quartzite pebble

Metamorphic rock (mainly SiO2)

Quartzite

Metamorphic rock (primarily SiO2)

Quartzite (River Cobble)

Metamorphic Quartz-rich Rock

Slate

Slate (Foliated metamorphic rock)

Phyllite

Phyllite (Foliated metamorphic rock)

Mica Schist

Schist (Crystalline metamorphic rock)

Boxwork Quartz / Septarian Jasper

Boxwork (SiO2 with iron oxide inclusions)

Quartzite Pebble

Metamorphic Quartzite (primarily SiO2)

Epidote with quartz/feldspar

Epidote, Ca2(Al,Fe)3(SiO4)3(OH)

Quartzite Pebble

Metamorphic Quartz (SiO2)

Ruby

Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)

Granite

Plutonic felsic rock (Quartz, Feldspar, Mica)

Smoky Quartz

Smoky Quartz (SiO ₂)

Cloudy Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Unakite

Epidotized Granite

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Prehnite

Prehnite, Ca2Al2Si3O10(OH)2

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)

Quartz Vein in Host Rock (Pebble)

Quartz (SiO2) with sandstone or siltstone matrix