Mineral On Igneous Rock

Granite

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

Basalt River Cobble

Basalt (Aphanitic Mafic Volcanic Rock)

Vesicular Basalt with Quartz/Chalcedony

Vesicular Basalt (primarily Plagioclase, Pyroxene, and Olivine with SiO2 infill)

Granite Cobble

Plutonic Igneous Rock (Granitic)

Diorite

Intermediate plutonic igneous rock

Granite

Granite (Felsic Plutonic Rock)

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Milky Quartz

Quartz (Silica / Silicon Dioxide), SiO2

Amygdaloidal Basalt

Amygdaloidal Basalt containing Zeolite and Calcite inclusions

Granite (Pink/Red)

Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Granite (Specimen: Logan Rock)

Phaneritic plutonic igneous rock (mainly Quartz, Feldspar, and Mica)

Black Obsidian

Obsidian (Volcanic Glass)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebbles

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (SiO2: Silicon Dioxide)

Smoky Quartz on Feldspar (Granite Pegmatite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)

K2 Azurite Granite / K2 Stone

Granite (igneous rock) with Azurite inclusions (mineral)

Granite

Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)

Snowflake Obsidian

Volcanic glass containing Spherulitic Cristobalite (SiO2)

Granite

Granite (a felsic intrusive igneous rock)

Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)

Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein

Epidote

Epidote (formula: Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Labradorite (Feldspar)

Labradorite, (Ca,Na)(Al,Si)4O8

Rough Sapphire (Corundum)

Corundum (Al2O3)

Blue Sapphire

Corundum (Al2O3)

Muscovite Mica

Muscovite: KAl2(AlSi3O10)(OH)2

Vesicular Basalt (Scoria)

Basalt (Extrusive Igneous Rock)

Amethyst

Amethyst (Silicon Dioxide - SiO2)

Dyed Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite inclusions

Granite

Phaneritic Felsic Igneous Rock

Granite

Phaneritic intrusive igneous rock

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Dalmatian Jasper

Peralkaline rhyolite

Amygdaloidal Basalt

Amygdaloidal Basalt (with secondary mineral infilling)

Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)

Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)

Gneiss

High-grade Metamorphic Gneiss

Felsic Igneous Rock (likely Rhyolite or weathered Granite)

Felsic Volcanic/Plutonic Rock

Granodiorite

Granodiorite (phaneritic intrusive igneous rock)

Obsidian

Volcanic Glass (SiO2)

Basalt

Basalt (dominated by plagioclase feldspar and pyroxene)

Rose Quartz

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