Sedimentary Or Metamorphic (Low Grade)

Granite Gneiss

Felsic Gneiss (composed of Quartz, Feldspar, and Biotite)

Chalcopyrite (Peacock Ore)

Chalcopyrite (CuFeS2)

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Greenstone (likely serpentinite or greenstone pebble)

Serpentinite-rich ultramafic rock; commonly dominated by serpentine-group minerals, with possible chlorite, actinolite, or magnetite

Greenstone (Epidote/Chlorite Schist)

Metabasalt (composed primarily of Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) and Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Blue Sapphire (in a faceted jewelry setting)

Corundum (Al2O3) with trace Iron and Titanium

Mica-rich metamorphic rock, likely schist

Muscovite–biotite schist, possibly with quartz and feldspar

Emerald in Matrix

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities

Graphite

Graphite (C)

Glaucophane Schist

Glaucophane-bearing Schist (Na2(Mg,Fe)3Al2Si8O22(OH)2)

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2

Serpentine

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

Muscovite Mica (Granitic Pegmatite)

Muscovite - KAl2(AlSi3O10)(OH)2

Staurolite (Fairy Cross)

Staurolite (Fe2+2Al9Si4O23(OH))

Quartzite with Garnet inclusion

Metamorphic Quartz-rich Rock

Propylitic Altered Andesite

Hydrothermally Altered Andesite

Crushed Stone Ballast

Crushed Limestone or Granite Aggregate

Blue Celestite

Celestine (SrSO4)

Quartz (Chert/Chalcedony variant)

Silicon dioxide (SiO2)

Tumbled cream-colored stone, likely quartzite or limestone

Probably quartzite (microcrystalline SiO₂); limestone alternative: calcite (CaCO₃)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Bituminous Coal

Coal (Sedimentary Rock)

Mica Schist

Mica Schist (Predominantly Muscovite/Biotite)

Granitic Gneiss

Gneiss (Metamorphic rock of granitic composition)

Schist

Mica Schist

Nuummite

Antophyllite-Gedrite Orthoamphibole (Mg,Fe)7Si8O22(OH)2

Quartzite

Quartzite (SiO2)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

White Jade / Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Serpentine

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

Schist

Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])

Copper-Bearing Sulfide Ore (likely Chalcopyrite or Bornite)

Chalcopyrite (CuFeS2) or Bornite (Cu5FeS4) in host rock

Schist

Mica Schist

Schist

Mica Schist

Serpentine Pebble

Serpentine ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)

Serpentinite

Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, or Chrysotile)

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Labradorite

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

Quartzite Pebble

Quartzite (SiO2)

Ruby, Emerald, and Sapphire (Corundum and Beryl)

Corundum (Al2O3) and Beryl (Be3Al2Si6O18)