Metamorphic (Likely Gneiss Or Schist Based On Texture)

Gneiss (specifically a Granitic Gneiss specimen)

Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)

Green Aventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite)

Ruby

Corundum (Al2O3 with Chromium trace impurities)

Pink Marble or Rose Quartz (Likely Pink Marble based on carving texture)

Recrystallized Calcite (CaCO3)

Glaucophane Schist (Blueschist)

Blueschist (Glaucophane-bearing schist)

Black Star Diopside

Diopside (CaMgSi2O6) with asterism

Gneiss with Quartz Vein

Gneiss containing Quartz (SiO2) filler

Greenschist (containing Epidote and Quartz)

Greenschist (Epidote-Chlorite-Actinolite Schist)

Epidote in Quartz

Quartz with Epidote inclusions (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) inclusions)

Schist

Mica Schist

Greenstone (Greenschist facies)

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Gneiss

Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Garnet Schist

Almandine Garnet Schist

Gneiss

Gneiss

Gneiss (specifically Banded Gneiss)

Gneiss

Gneiss

Gneiss

Clear Quartz (or Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Greenstone (Metabaltic/Greenschist)

Chlorite schist / Meta-basalt

Garnet (Almandine variety)

Almandine, Fe3Al2(SiO4)3

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Quartzite (Yellow/Tan)

Metamorphic Rock composed of Quartz (SiO₂)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Black Tourmaline

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

Epidote

Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)

Schist (with Iron Oxide)

Mica Schist

Biotite Schist

Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Jasper in Quartzite (likely Cinnabar or Iron inclusions)

Silicon dioxide (SiO2) with impurities

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Emerald

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

Quartz

Quartz (SiO₂)

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay impurities

Schist

Mica Schist (variety: Muscovite/Biotite Schist)

Quartzite with Mica schist fragment

Quartzite (SiO2) with Muscovite/Biotite Schist

Rough Emerald (Beryl)

Emerald (Be3Al2(SiO3)6 with Cr/V impurities)

Quartzite

Quartzite (SiO2)

Epidote in Matrix (likely Amphibolite or Gneiss)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Metamorphic Matrix

Garnet Schist

Almandine-Muscovite Schist