Mineral Based Human Made Alloy

Granite

Phaneritic Plutonic Felsic Rock

Dalmation Stone (Dalmation Jasper)

Peralkaline Rock with Feldspar and Arfvedsonite

Rough Topaz

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

Muscovite Mica

Muscovite [KAl2(AlSi3O10)(OH)2]

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Rough Green Sapphire (Corundum)

Corundum (Al2O3 - Aluminum Oxide with trace elements)

Biotite (Mica)

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

Mica

Phyllosilicate (group name), typically Muscovite KAl2(AlSi3O10)(OH)2 or Biotite K(Mg,Fe)3(AlSi3O10)(OH)2

Blue Topaz

Aluminum silicate fluoride hydroxide (Al2SiO4(F, OH)2)

Precious Opal

Hydrated Silica (SiO2·nH2O)

Greenstone / Basalt with Amygdule

Amygdaloidal Basalt (altered to Greenstone)

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Granite

Granite (High-silica plutonic rock)

Granodiorite Pebble

Granodiorite

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Green Mica Schist

Mica Schist (Fuchsite or Chlorite variety)

Granite

Granite (Felsic Plutonic Rock)

Granodiorite

Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)

Basalt with Iron Oxidation

Vesicular Basalt (Aphanitic Mafic Igneous Rock)

River Jasper (Green Jasper)

Silicon Dioxide (SiO2) with impurities

Granite

Granite (Alkali-feldspar granite)

Muscovite Mica Schist

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

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Chert (specifically Tan/Brown Chert)

Chert (SiO2)

Chert (Tripolitic Chert / Flint Nodules)

Microcrystalline Quartz (SiO2)

Granite (River Cobble)

Granite (rich in feldspar, quartz, and biotite)

Coarse Sandstone Pebble

Clastic Sedimentary Rock (Sandstone)

Muscovite Mica

Muscovite [KAl2(AlSi3O10)(OH)2]

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Dalmatian Jasper

Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite

Fuchsite

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2)

Vesicular Basalt

Aphanitic Mafic Volcanic Rock

Quartzite with Iron Inclusions

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)

Slate

Foliated Metamorphic Rock

Greenschist

Chlorite schist

Pink Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Mica (likely Muscovite)

Muscovite / KAl2(AlSi3O10)(OH)2

Rounded basalt pebble

Basalt, aphanitic mafic volcanic rock; primarily plagioclase and pyroxene with possible olivine

Black basalt

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and commonly olivine

Milky Quartz with Mica (Gneiss/Schist influence)

Silicon Dioxide (SiO2) with Phyllosilicates

Mica Schist

Schist (Biotite/Muscovite dominant)