Metamorphic Or Sedimentary Depending On Local Grade

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (chiefly SiO2)

Schist (Micaceous)

Mica Schist (predominantly Muscovite or Biotite)

Shungite

Non-crystalline carbon (high-carbon metamorphic rock)

Rough Diamond

Diamond (pure carbon / C)

White Marble (Industrial/Architectural)

Recrystallized Calcite (CaCO3)

Diamond

C (Carbon)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Greenstone / Diabase Porphyry

Porphyritic Diabase (Micro-gabbro)

Marble

Recrystallized Calcite (CaCO3)

Unidentifiable Specimen

Undetermined

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Vesicular Basalt with Opal or Quartz

Vesicular Basalt (Amorphous SiO2.nH2O if Opal)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Tiger Iron

Tiger Iron (A complex combination of Hematite Fe2O3, Red Jasper SiO2, and Tiger's Eye SiO2/FeOOH)

Epidote

Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Pyrite

Pyrite (FeS₂)

Lazulite

Magnesium Aluminum Phosphate Hydroxide (MgAl2(PO4)2(OH)2)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Emerald / Green Beryl

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Quartz

Quartz (SiO2 - Silicon Dioxide)

Serpentinite

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

River Cobble (Gneiss/Migmatite)

Gneissic Metamorphic Rock (composed mainly of Quartz, Feldspar, and Biotite)

Slate

Slate

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Mixed Gemstone Bracelet

Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)

Green Aura Quartz (Titanium treated Kyanite or Quartz)

Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating

Epidote in Quartz (Epidosite)

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Garnet (Almandine variety)

Almandine, Fe3Al2(SiO4)3

Quartzite

Quartzite (primarily SiO2)

Gneiss (Metamorphic Rock)

Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)

Calcite

Calcium Carbonate (CaCO3)

Green Tourmaline

Elbaite (part of Tourmaline group), Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4

Sand (Construction Grade)

Unconsolidated siliciclastic sediment (primarily SiO2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Nephrite Jade

Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2

Picture Jasper

Silicon dioxide (SiO2)

Prehnite with Epidote inclusions

Prehnite: Ca2Al(AlSi3O10)(OH)2; Epidote: Ca2(Al,Fe)3(SiO4)3(OH)

Iron Meteorite

Siderite (Iron-Nickel Alloy), predominantly Kamacite and Taenite (Fe, Ni)