Metamorphic Rock

Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles

Mixed gemstones (primarily Silicon Dioxide - SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

River Pebble (likely Quartzite or Chert)

Silicon Dioxide (SiO2) crystal conglomerate

Quartz (Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Clear Quartz (Rock Crystal Fragments)

Silicon Dioxide (SiO2)

Quartz (various varieties)

SiO₂ (Silicon Dioxide)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Amethyst

SiO2 (Silicon Dioxide)

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

White Quartz

Quartz (SiO2)

Lapis Lazuli (polished cabochon)

Lazurite-rich rock (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2)

Muscovite Mica

Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2

Labradorite

Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)

Zoisite with Ruby (Anyolite)

Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Blue Lace Agate

Chalcedony (a form of Quartz) - SiO2

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Nephrite Jade

Nephrite

Quartz

Silicon Dioxide (SiO₂)

Dumortierite Quartz

Dumortierite-bearing Quartz (Al7BO3(SiO4)3O3)

Granite

Granite (a felsic intrusive igneous rock)

Rhodonite, Gray Moonstone, and White Feldspar Mix

Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)

Pyrite

Pyrite (Iron Disulfide), FeS2

Dendritic Agate

Silicon Dioxide with Manganese or Iron Oxide inclusions (SiO2 + Mn/Fe)

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Epidote

Epidote - Ca2(Al,Fe)3(SiO4)3(OH)

Jasper and Quartzite Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Rhodonite

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

Rhodonite

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

Blue Apatite

Apatite, Ca5(PO4)3(F,Cl,OH)

Greenschist

Greenschist (Chlorite Schist)

Quartz (likely a weathered/tumbled piece)

Quartz (SiO₂)

Garnet (Almandine or Spessartine likely)

Garnet Group Minerals (e.g., Almandine Fe3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3)

Staurolite

Staurolite (Fe2+2Al9Si4O23(OH))

Kyanite

Kyanite (Al2SiO5)

Green Aventurine (likely)

Silicon dioxide (SiO2) with fuchsitemica inclusions