Mineral Based Human Made Alloy

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Copper-bearing Mica Schist

Mica Schist with Native Copper inclusions

Sandstone (Iron-stained)

Clastic sedimentary rock (SiO2 with Fe2O3 staining)

Citrine (likely Heat-Treated)

Quartz (Silicon Dioxide, SiO2)

Granite

Phaneritic Felsic Igneous Rock

Basalt with Scoria/Vesicular Texture

Vesicular Basalt (Iron-rich/Oxidized)

Granite

Granite (composed primarily of Quartz SiO2, Potassium Feldspar KAlSi3O8, and Plagioclase)

Granite

Phaneritic Felsic Igneous Rock

Quartz Crystal (specifically a Double-Terminated variety)

Silicon Dioxide (SiO2) - Low Quartz

Mahogany Obsidian

Volcanic Glass with Hematite inclusions (SiO2 + Fe2O3)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 inclusions)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement

Mica Schist

Mica Schist (Complex Silicate Rock)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Labradorite

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

Dendritic Opal (Common Opal)

Amorphous Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions

Mica (Biotite or Phlogopite variety)

Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)

Basalt with Iron Oxidation

Mafic Igneous Rock (Basalt)

Biotite Schist

Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)

Quartz with Mica (Gneissic or Pegmatitic origin)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(F,OH)2)

Basalt with Epidote Veins

Mafic Igneous Rock (Basalt)

Vesicular Basalt (or Scoria)

Vesicular Basalt (Aphanitic-vesicular volcanic rock)

Basalt

Extrusive mafic igneous rock

Granite

Phaneritic Felsic Igneous Rock

Porphyritic Basalt (with Amygdales)

Amygdaloidal Porphyritic Basalt

Garnet Schist

Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)

Picasso Stone

Metamorphosed Calcium Carbonate (Limestone)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Quartzose Pebble)

Clastic sedimentary rock (primarily SiO2)

Diorite (Salt and Pepper Rock)

Diorite

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Basalt

Basalt (composition predominately plagioclase feldspar and pyroxene)

Diorite

Phaneritic Intermediate Igneous Rock

Granite (Alkali-feldspar rich)

Phaneritic Felsic Igneous Rock (Major components: KAlSi3O8, SiO2)

Conglomerate (River Rock)

Clastic sedimentary rock (primarily SiO2)

Ironstone (Limonitic Sandstone)

Ferruginous Sandstone (rich in Limonite: FeO(OH)·nH2O)

Granite

Phaneritic plutonic rock (composed mainly of SiO2, Al2O3, K2O, and Na2O)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite - Lithium-rich Mica)

Labradorite

(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)