Mineral On Igneous Rock

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt)

Porphyritic Basalt (Mafic volcanic rock)

Gneiss (Cobble)

Gneiss

Basalt with Amygdaloidal Inclusions

Aphanitic Mafic Volcanic Rock (Basalt)

Quartz

Silicon Dioxide (SiO2)

Garnet (almandine or pyrope variety)

Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3

Basalt with Iron Oxidation

Extrusive Mafic Igneous Rock (composed of Plagioclase and Pyroxene)

Common Opal in Host Rock

Hydrated Silica (SiO2·nH2O)

Quartz Druze on Matrix (Geode Fragment)

Quartz (Silicon Dioxide, SiO2)

Grey Granite

Phaneritic Felsic Intrusive Igneous Rock

Quartz (Common Milky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Diorite

Diorite (intermediate intrusive igneous rock)

Epidote-bearing Granite (Unakite-like)

Epidotized Granite

Gneiss (specifically Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Rose Quartz

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

Clear Quartz Cluster

Quartz (Silicon Dioxide - SiO2)

Milk Quartz (White) and Yellow Aventurine (Yellow)

Silicon Dioxide (SiO2)

Quartz (White/Milky with Iron Staining)

Silicon Dioxide (SiO2)

Ruby (Pinkish-Red)

Corundum (Al2O3 with Chromium trace)

Tree Agate (Dendritic Agate/Quartz)

Silicon Dioxide (SiO2) with trace Manganese or Iron oxide inclusions

Dyed Agate Geode (Pink/Magenta)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Carnelian Agate (with Quartz/Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Diorite

Diorite (Intermediate intrusive igneous rock)

Granite (Dioritic or Hornblende-rich)

Phaneritic Plutonic Felsic to Intermediate Igneous Rock

Granite

Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)

Vesicular Basalt

Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 (Pyroxene) and (Ca,Na)Al(Al,Si)Si2O8 (Plagioclase Feldspar)

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Demitasse Granite (Diorite-Granite transition)

Intermediate Plutonic Rock (Granodiorite/Diorite mix)

Granite

Intrusive Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Basalt

Basalt (Aphanitic-fine grained mafic igneous rock)

Porphyritic Rhyolite (Birdseye Rhyolite)

Rhyolite (Porphyritic texture)

Amygdaloidal Basalt

Amygdaloidal Basalt

Gneiss

High-grade metamorphic rock (Gneiss)

Clear Quartz

Silicon Dioxide (SiO2)

Granite Pebble

Igneous Intrusive Rock (Quartz-Feldspar-Mica Phenocrysts)

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)