Mineral On Igneous Rock

Granite

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

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Granodiorite / Granite

Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)

Quartz

SiO₂ (Silicon Dioxide)

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Snowflake Obsidian

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

Quartz Pebble

Silicon Dioxide (SiO2)

Granite

Granite (Phaneritic Igneous Rock; primarily Quartz, Alkali Feldspar, and Plagioclase)

Granite (White Granite variant)

Phaneritic Plutonic Rock (High-silica Felsic)

Basalt River Stone

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Vesicular Basalt

Extrusive mafic igneous rock (primarily Plagioclase Feldspar and Pyroxene)

Basalt (Crushed Stone Aggregate)

Mafic Volcanic Basalt (Major Minerals: Plagioclase Feldspar, Pyroxene, Olivine)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Sunstone (variety of Feldspar)

Oligoclase Sunstone, Plagioclase Feldspar (Na,Ca)Al(Si,Al)Si2O8

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Quartz Crystal Cluster

Quartz (Silicon Dioxide, SiO2)

Basalt with Weathered Surface

Basalt

Unknown Rock Specimen

Granite

Granite (Phaneritic intrusive igneous rock)

Stream Pebble (Basalt/Greywacke)

Mafic Igneous Rock (Fine-grained)

Granite

Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Granite (Pink/Red)

Phaneritic Igneous Rock (Rich in K-Feldspar)

White Quartz

Quartz (SiO2)

Drill Core Samples (Varied Lithology)

Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)

Quartz Crystal (specifically Rock Crystal)

Silicon Dioxide (SiO2)

Granite River Pebble

Phaneritic Felsic Igneous Rock (Granite)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Granite

Granite (composed of Quartz, Alkali Feldspar, and Plagioclase)

Pink Granite (Potassium-rich)

Phaneritic Felsic Igneous Rock (K-Feldspar Granite)

Granite

Granite (Felsic Plutonic Rock)

Basalt with Scoria/Vesicular Texture

Vesicular Basalt (Iron-rich/Oxidized)

Pink Granite

Phaneritic Plutonic Felsic Rock (Granite)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss (specifically a Banded Gneiss cobble)

Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Granite

Phaneritic Acidic Igneous Rock (Granite Group)

Greenschist

Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)

Granite

Phaneritic plutonic rock (composed of Quartz, Feldspar, and Mica/Amphibole)

Quartz (Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)