Mineral On Igneous Rock

Likely basalt or other dark igneous rock

Basalt; predominantly plagioclase feldspar and pyroxene, possibly olivine

Granite Pebble (Pegmatitic Quartz-Feldspar River Rock)

Granite / Quartz-Feldspar-Mica Aggregate

Granite

Granite (Felsic Plutonic Rock)

Diorite (Porphyritic) / Granite

Plutonic Igneous Rock (Granodiorite / Diorite)

Granite

Granite (a common igneous rock)

Amygdaloidal Basalt

Basalt (Igneous Volcanic Rock with secondary mineral infilling)

Porphyritic Basalt

Basalt (with plagioclase or k-feldspar phenocrysts)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Unakite

Epidotized Granite

Pegmatite

Igneous Pegmatite

Yellow Quartz

Silicon Dioxide (SiO2)

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

Diorite with Quartz Veins

Diorite

Granite Pebble (Weathered)

Phaneritic Felsic Igneous Rock

Spinifex Texture Komatiite

Komatiite (Ultramafic Volcanic Rock)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Peridotite

Ultramafic intrusive igneous rock

Epidote

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

Granite

Felsic intrusive igneous rock

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Granite

Phaneritic Igneous Rock (Granite)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Granitic Gneiss

Gneiss (quartz-feldspar-mica complex)

Dark igneous rock, likely basalt

Basalt; chiefly plagioclase feldspar, pyroxene, and possibly olivine

Vesicular basalt

Basalt, a mafic volcanic rock composed mainly of plagioclase feldspar, pyroxene, and often olivine

Milky Quartz

Silicon Dioxide (SiO2)

Dark gray fine-grained rock fragment

Likely basalt (possibly andesite); exact identification is limited by the photograph

Granite

Granite (Intrusive Igneous Rock)

Amygdaloidal Basalt

Amygdaloidal Mafic Volcanic Rock

Quartz Vein in Matrix

Silicon Dioxide (SiO2) within Rhyolitic or Granitic Matrix

Dalmatian Stone

Dalmatian Jasper / Aplite

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Granite

Felsic intrusive igneous rock

Granite Pebble

Granite

Weathered Basalt with Iron Staining

Mafic Igneous Rock

Dalmation Stone

Peralkaline Rock (mixed silicate minerals)

Granite Pebble (River Rock)

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

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

Milky Quartz (Quartz Vein)

Silicon Dioxide (SiO2)

Granite

Granite (Phaneritic intrusive igneous rock)

Agate

Chalcedony (SiO2)