Mineral Based Alloy (Anthropogenic)

Sandstone (Greywacke)

Clastic Sedimentary Rock (SiO2 with lithic fragments)

Siltstone

Siltstone (fined-grained clastic sedimentary rock)

Basalt

Basalt (composition primarily Plagioclase Feldspar and Pyroxene)

Porphyritic Basalt

Porphyritic Basalt (containing Plagioclase phenocrysts)

Limestone (Weathered)

Calcium Carbonate (CaCO3)

Limestone (Fossiliferous)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Basalt

Basalt

Vesicular Basalt

Basalt (principally Plagioclase and Pyroxene)

Limestone

Calcium Carbonate (CaCO3)

Basalt

Basalt (various silicate compositions)

Ferruginous Sandstone (Ironstone)

Sedimentary rock with Limonite/Goethite cement

Chert (and Limestone)

Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3)

Conglomerate

Conglomerate (clastic sedimentary rock)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Basalt (River Stone)

Extrusive mafic igneous rock

Vesicular Basalt

Basalt

Porphyritic Basalt or Andesite

Porphyritic Basalt / Andesite

Crushed Stone (Likely Granite or Diabase)

Intrusive Igneous Rock (Granitoid/Gabbroid)

Andesite

Intermediate Volcanic Rock (Plagioclase-dominant)

Granite (Worn Pebble)

Granite

Muscovite Schist with Quartz

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

Muscovite Schist

Mica Schist (KAl2(AlSi3O10)(OH)2)

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

Quartz with Mica (likely Muscovite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride

Mica Schist

Mica Schist (primarily composed of Muscovite, Biotite, and Quartz)

Pegmatite with Quartz and Muscovite Mica

Granitic Pegmatite (KAl2(AlSi3O10)(OH)2 + SiO2)

Gabbro

Gabbro (mafic intrusive igneous rock)

Anthracite Coal

Anthracite (Carbon-based organic sedimentary rock exposed to metamorphic heat/pressure; Chemical composition is approximately 86%–98% Carbon)

Biotite Schist

Biotite-rich Schist (containing K(Mg,Fe)3AlSi3O10(OH,F)2)

Mica Schist with Garnet inclusions

Mica Schist (primarily Muscovite and Biotite - KAl2(AlSi3O10)(OH)2)

Poppy Jasper

Jasper (variety of Chalcedony), SiO2 (Silicon Dioxide)

Serpentine

Antigorite / Lizardite / Chrysotile [(Mg,Fe)3Si2O5(OH)4]

Serpentinite

Serpentinite (composed mainly of Group: Serpentine; (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Fossil Coral (Honeycomb Coral)

Favosites (extinct genus of Tabulate coral)

Graphite Schist

C (Carbonaceous Schist)

Asphalt (Aggregate)

Bituminous macadam / Concrete Aggregate

Coquina

Biogenic Limestone (Calcite, CaCO3)

Granite

Granite (a felsic intrusive igneous rock)

Andesite

Andesite (Intermediate Volcanic Rock)

Greenstone / Serpentinite

Antigorite/Lizardite series (Mg,Fe)3Si2O5(OH)4

Zebra Rock (Zebra Stone / Ribbon Stone)

Siltstone with Ferruginous Banding (Primarily Quartz, Kaolinite, and Hematite)