Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)

Pumice

Pumice (Vesicular Rhyolite/Andesite)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Granite

Granite (Felsic Plutonic Rock)

Fluorite

Calcium Fluoride (CaF2)

Diorite

Diorite (Intermediate plutonic rock)

Granodiorite or Diorite

Granodiorite / Diorite

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Massive Quartz (Milky or Gray)

Silicon Dioxide (SiO2)

Peridot (Olivine)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Greenstone (Epidosite)

Epidosite (Metamorphosed Basalt/Diabase)

Diorite or Granodiorite Pebble

Intermediate Phaneritic Igneous Rock

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Dyed Pumice

Vesicular Rhyolite (Artificial Coloration Addition)

Greenschist

Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)

Vesicular Basalt

Extrusive Mafic Igneous Rock with Vesicular Texture

Lepidolite in Quartz (Lithium-bearing Ore)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) and Quartz (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Peridot (Gem-quality Olivine)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

Alkali Basalt with iron oxidation

Mafic Volcanic Rock (Fe-bearing Basalt)

Pyrite

Iron Disulfide (FeS2)

Diorite

Phaneritic intermediate plutonic rock

Granitic Pegmatite with Tourmaline/Chlorite

Pegmatite

Granite

Intrusive Igneous Rock

K-Feldspar / Granite Pegmatite

Potassium Feldspar (Microcline/Orthoclase) with Quartz

Granite

Felsic intrusive igneous rock

Quartz (specifically Milky or Clear Quartz)

Silicon Dioxide (SiO2)

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Quartz

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide (Limonite/Hematite) coating

Smoky Quartz on Feldspar (Granite Pegmatite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)

Vesicular Basalt with Epidote

Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Granite

Granite (phaneritic intrusive felsic igneous rock)

River Cobble (likely Basalt)

Mafic Igneous Rock (Aphanitic)

Amygdaloidal Basalt with Secondary Minerals

Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)

Basalt

Extrusive Igneous Rock

Sandstone (with potentially high Feldspar/Arkose content)

Clastic sedimentary rock (SiO2 dominated)

Sandstone (Ferruginous Concretion)

Arenite (with iron oxide cement)

Sandstone (Iron-stained)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Granite

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

Black Obsidian

Obsidian (Volcanic Glass)

Pumice (or Volcanic Scoria)

Vesicular Rhyolite or Vesicular Basalt

Clear Quartz

Silicon dioxide (SiO2)