Mineral (Metamorphic Pseudomorph)

Muscovite Mica

Muscovite: KAl2(AlSi3O10)(OH)2

Chlorite (Small Flakes/Sand)

Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Greenschist

Chlorite schist

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Blue Calcite

Calcium Carbonate (CaCO3)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Blue Quartz (Dumortierite Quartz)

Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)

Orange Calcite

Calcium Carbonate (CaCO3)

Ruby in Fuchsite

Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)

Greenschist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Blue Quartzite

Quartzite (silicon dioxide, SiO2)

Sapphirine in Magnesian Schist

Sapphirine: (Mg,Al)8(Al,Si)6O20

Emerald in Matrix (Quartz/Schist)

Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities

Specular Hematite

Specularite (Fe2O3)

Pyrite (on the right) and Magnetite or Hematite (on the left)

Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)

Rhodonite

Manganese Silicate (Mn, Fe, Mg, Ca)SiO3

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Schist

N/A (a rock type, not a mineral formula)

White Calcite

Calcium Carbonate (CaCO3)

Gneiss

Gneiss (Metamorphic high-grade)

Vesuvianite (Idocrase)

Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10

Jasper containing epidote (Unakite-like)

Epidotized Jasper (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Jade

There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.

Schist

Mica Schist

Turquoise and Hematite

CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)

Greenschist

Chlorite schist

Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Muscovite Mica

KAl2(AlSi3O10)(F,OH)2

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Amphibolite with Hornblende

Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Amethyst (Purple), Sulfur (Yellow), and Blue Apatite

SiO2 (Quartz), S (Native Sulfur), Ca5(PO4)3(F,Cl,OH) (Apatite Group)

Red Garnet

Almandine and Pyrope (Silicate minerals: Fe3Al2(SiO4)3 and Mg3Al2(SiO4)3)

Black Tourmaline

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

Pyrite on Quartz matrix

Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Pyrite in Quartzite/Graphite Matrix

Iron Sulfide (FeS2)

Green Calcite

Calcium Carbonate (CaCO3)