Mineral Based Alloy (Anthropogenic)

Basalt

Basalt (Mafic volcanic rock)

Ferruginous Sandstone (Ironstone Conglomerate fragments)

Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)

Basalt

Basalt (Mafic volcanic rock)

Chert (Flint)

Silicon Dioxide (SiO2)

Basalt River Pebble

Basalt

Basalt

Extrusive mafic igneous rock

Coral Rock (Coquina)

Biogenic Limestone (Calcium Carbonate - CaCO3)

Limestone

Calcite-rich Sedimentary Rock (CaCO3)

Basalt with Scoria

Mafic Volcanic Rock (Basalt/Scoria)

Basalt

Extrusive Mafic Igneous Rock

Basalt

Basalt (composition of plagioclase feldspar, pyroxene, and olivine)

Limestone (with Iron-Oxide staining)

Sedimentary Calcium Carbonate (CaCO3)

Basalt

Basalt (Mafic volcanic rock)

River Cobble (Quartzite and Iron-stained Quartz)

Quartzite (SiO2 with iron oxide impurities)

Granite (Pink/Potassium-rich)

Phaneritic Plutonic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)

Vesicular Basalt (or Scoria)

Basalt (Aphanitic-Vesicular Mafic Igneous Rock)

Basalt (River Pebble)

Basalt

Basalt with Porphyritic Texture

Porphyritic Basalt

Basalt (Vesicular and Ropey)

Vesicular Basalt / Pahoehoe Basalt

Basalt (River Pebble)

Extrusive mafic igneous rock

Porfido (Porphyritic Rock)

Porphyry (often Rhyolitic or Andesitic)

Muscovite on Quartz (Mica host rock)

KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)

Mica Schist

Muscovite Schist (KAl2(AlSi3O10)(OH)2)

Noble Serpentine

Antigorite (Mg3Si2O5(OH)4)

Que Sera Stone (Llanite)

Rhyolite Porphyry with Blue Quartz and Feldspar

Mica Schist

Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)

Chert (with Fossiliferous Silicification)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Golden Mica Schist

Mica Schist (primarily Muscovite/Biotite with Quartz)

Serpentine

Serpentinite (complex of Mg, Fe, Ni, Al, Zn, Mn)Si2O5(OH)4

Jasper and Basalt (Mixed Breccia or Chert)

Silicon Dioxide (SiO2) with Ferromagnesian silicates

Serpentine

Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)

Quartzite (River Pebble)

Quartzite (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Porphyritic Basalt

Porphyritic Basalt (containing Plagioclase or Alkali Feldspar phenocrysts)

Basalt

Basalt (dominated by Plagioclase Feldspar and Pyroxene)

Pink Granite

Granite (Phaneritic igneous rock)

Basalt (Vesicular)

Extrusive mafic igneous rock

Basalt (with possible iron oxide staining)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Basalt

Africite (Mafic Igneous Rock)

Pink Granite

Granite (Felsic Plutonic Rock)

Basalt

Extrusive mafic igneous rock

Granite

Granite (Felsic Plutonic Rock)