Mineral And Metamorphic Rock

Granite

Plutonic felsic rock (Quartz, Feldspar, Mica)

Green Aventurine

Quartz (Aventurine variety) - SiO₂ with Fuchsite inclusions

Red Jade (Dyed Quartzite)

Silicon Dioxide (SiO2) - variety Quartzite

Dendritic Jasper

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite in Matrix (Fool's Gold)

Iron Disulfide (FeS2)

Granite (Specimen: Logan Rock)

Phaneritic plutonic igneous rock (mainly Quartz, Feldspar, and Mica)

Pyrite

Iron Pyrite (FeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Picture Sandstone)

Arenite (primarily SiO2)

Quartz (Drusy/Crystalline)

Silicon Dioxide (SiO2)

Spessartine Garnet

Manganese aluminum silicate (Mn2+3Al2(SiO4)3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite (River-worn pebble)

Quartzite (Mainly SiO2)

Shungite (Noble/Type II)

Non-crystalline carbon (Fullerene-bearing carbonaceous rock)

Inspirational River Stone (Quartzite)

Metamorphosed Quartz-rich Rock (Quartzite) with SiO2 composition

Sandstone

Arenite (SiO2 based with various mineral cements)

Sandstone (specifically Banded Sandstone)

Clastic sedimentary rock (primarily SiO2)

Granite

Phaneritic Plutonic Igneous Rock (primarily composed of quartz, alkali feldspar, and plagioclase)

Talc (Soapstone variety)

Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Extrusive volcanic rock)

Basalt Porphyry

Porphyritic Basalt

Sandstone (with Limonite staining)

Arenite (primarily SiO2 with FeO(OH)·nH2O)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (SiO2 silicon dioxide)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Sandstone

Arenite (SiO2 primarily)

Rhodonite

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

Glauconite (Glauconitic Sandstone)

Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Sandstone

Sandstone (various mineral compositions)

Lepidolite Polished Point

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Nephrite Jade

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

Mica

Phlogopite or Biotite group (KMg3(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Rhodonite

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

Lepidolite Bracelet

Lepidolite (K(Li,Al)3(Si,Al)4O10(F,OH)2) often in Quartz matrix

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Shale

Clastic sedimentary rock (primarily clay and silt minerals)

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Concretion

Various mineral compositions, typically carbonate or iron oxide cemented sediment