Sedimentary Or Metamorphic Derived

Citrine

Citrine (Silicon Dioxide, SiO2)

Fuchsite (Green Muscovite in Quartz)

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

River Quartzite (or Quartz Cobble)

Quartzite (primarily Silicon Dioxide - SiO2)

Emerald

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

Quartz Pebble (with potential iron inclusions)

Silicon Dioxide (SiO2)

Ruby (Pink to Red Corundum)

Al2O3 (Corundum with Chromium impurities)

Moonstone (specifically Cat's Eye or Gray Moonstone)

Orthoclase (Potassium Aluminum Silicate) with the formula (K,Na)AlSi3O8

Quartz / Iron-Stained Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions/staining

Corundum (Ruby variety)

Aluminium oxide (Al2O3)

Moonstone (Green Moonstone / Garnierite)

Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Garnierite

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)

Milky Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartzite (Iron-stained Quartzite)

Quartzite with Iron oxides (FeO(OH) / Fe2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Garnet (specifically Almandine or Pyrope)

Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)

Emerald

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

Moonstone

Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8

Yellow Quartzite

Quartzite (primarily Silicon Dioxide - SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz with Mica Schist (Pegmatite Specimen)

SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)

Milk Quartz (White) and Yellow Aventurine (Yellow)

Silicon Dioxide (SiO2)

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)

Alexandrite in Matrix

Chrysoberyl (BeAl2O4 with Chromium impurities)

Serpentinite

Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Banded Agate (Gray Agate)

Silicon Dioxide (SiO2) - Chalcedony

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Blue Apatite

Chlorapatite / Fluorapatite (Ca5(PO4)3(F,Cl,OH))

Mixed Mineral Specimens

Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)

Pink Sapphire

Corundum (Al2O3 with Chromium/Titanium/Iron traces)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Ruby

Corundum (Al2O3 with Chromium trace impurities)

White Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Milky/Yellowish)

Silicon Dioxide (SiO2)

Gold Nugget

Native Gold (Au)

Quartz (Iron-stained)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Moonstone

Orthoclase/Albite (KAlSi3O8 / NaAlSi3O8) with Adularescence

Banded Agate

Cryptocrystalline Quartz (SiO2)