Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
metamorphic
Category
Igneous, Sedimentary, Or Metamorphic (Mineral Based)
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Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Rough Gemstone Grains (Mixed Sapphires and Quartz)
Corundum (Al2O3) and Quartz (SiO2)
mineral
Shungite
Non-crystalline carbon (allotrope of carbon)
metamorphic
Granitic Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Blue Sapphire
Corundum (Al2O3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Sapphire
Corundum (Al2O3)
mineral
Pink Granite
Phaneritic Granitoid
igneous
Gneiss (River Cobble)
Gneiss
metamorphic
Colorless Quartz (Rhinestone)
Silicon Dioxide (SiO2)
mineral
Quartzite with Mica / Gneiss Pebble
Metamorphic Rock (Quartz-Feldspar-Mica aggregate)
metamorphic
Green Kyanite
Kyanite (Al2SiO5)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Iridescent schist or phyllite
Micaceous quartz-rich schist/phyllite, likely containing muscovite or chlorite
metamorphic
Graphite
Graphite (C)
mineral
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
metamorphic
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Quartz / Quartzite
Silicon Dioxide (SiO2)
metamorphic
Kyanite
Kyanite (Al2SiO5)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Gneiss
Gneiss
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Muscovite
KAl2(AlSi3O10)(OH)2
mineral
Graphite
Graphite (Carbon, C)
mineral
Peacock Ore
Bornite (Cu5FeS4) or Chalcopyrite treated with acid
mineral
Greenschist
Chlorite Schist
metamorphic
Graphite
Graphite (Carbon, C)
mineral
Anthracite Coal
Anthracite (Carbon based)
metamorphic
Mixed Gemstone Collection
SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)
mineral
Unidentified Dark Mineral or Rock
Indeterminate (Likely Silicon Dioxide or Carbon-based)
mineral
Gravel (Crushed Stone Aggregates)
Mixed Siliciclastic / Carbonate Aggregate
sedimentary
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
mineral
Zoisite with Hornblende
Zoisite (Ca2Al3(SiO4)3(OH)) with Amphibole inclusions
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
River Cobble (Quartzite or Gneiss)
Metamorphic crystalline rock (predominantly SiO2 based)
metamorphic
Aura Quartz Bead
Silicon dioxide (SiO2) with metal coating
mineral with artificial coating
Mica Schist
Mica Schist
metamorphic
Likely chlorite-bearing schist (possibly greenschist)
Chlorite–quartz–mica schist; commonly contains muscovite/biotite and feldspar
metamorphic
Painted River Rock (likely Quartzite or Granite)
Quartzite or Granitic Gneiss (painted)
metamorphic