Mineral And Metamorphic Rock

Amethyst and Ruby in Zoisite

Silicon Dioxide (SiO2) and Anyolite (Zoisite-Hornblende-Ruby mix)

Raw Emerald in Schist Matrix

Beryl (Be3Al2Si6O18) in Mica Schist

Serpentinite (likely serpentinized ultramafic rock)

Serpentine-group minerals, chiefly antigorite/lizardite; commonly derived from peridotite

Biotite Mica Schist

Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2

Banded Gneiss Pebble

Gneiss (Metamorphic Rock)

Quartz-rich metamorphic rock, likely milky quartz or quartzite

Quartz (SiO₂); possibly quartzite composed predominantly of recrystallized quartz

Nephrite Jade

Nephrite

Gneiss

Gneiss (foliated metamorphic rock)

Schist

Crystalline Metamorphic Rock (Schistose)

Quartz-veined Metamorphic Rock

Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)

Greenstone (likely serpentinite or chlorite-rich metamorphic rock)

Probable serpentinite/chlorite schist; commonly dominated by serpentine-group minerals, chlorite, talc, and magnetite

Biotite-bearing gneiss or schist

Quartz–feldspar–biotite metamorphic rock

Rhodonite-bearing metamorphic rock

Manganese-rich metamorphic rock, chiefly rhodonite (MnSiO₃), with quartz and manganese oxides

Hematite

Iron Oxide (Fe2O3)

Quartz-rich gravel fragment

Quartz (silicon dioxide, SiO₂), possibly with feldspar or carbonate inclusions

Agate

Silicon Dioxide (Chalcedony), SiO2

Rounded pale quartz-rich pebble

Likely milky quartz or quartzite (SiO₂); exact identification is uncertain from the photograph

Aquamarine

Beryl (Be3Al2Si6O18 with Fe impurities)

Granite with Epidote

Granite, containing quartz, feldspar, and epidote

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Granitic gneiss (weathered, rounded cobble)

Foliated granitoid; primarily quartz, feldspar, and mica (composition commonly approximates granite)

Milky quartz (likely quartz vein fragment)

Quartz, silicon dioxide (SiO₂)

Milky quartz fragments

Quartz (silicon dioxide, SiO₂)

Quartzite with Feldspar and Mica (Granitic Gneiss Pebble)

Metamorphic Rock / Quartzite / Granitic Gneiss

Milky quartz (likely weathered quartzite or quartz vein fragment)

Quartz, silicon dioxide (SiO₂)

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Quartz (Raw and Water-worn)

Silicon Dioxide (SiO2)

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Pyrite (Fool's Gold) in Matrix

Iron Disulfide (FeS2)

Schist

Schist (metamorphic rock)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz-rich breccia or vein quartz with dark inclusions

Milky quartz (SiO₂), likely brecciated and cemented with iron oxides and dark mica/amphibole minerals

Polished Hematite Tower

Hematite (Fe2O3)

Quartz-bearing rock or quartz-rich mineral specimen

Quartz, silicon dioxide (SiO₂); exact host rock is uncertain from the image

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Milky quartz (rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Mixed rock and mineral collection

Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials

Magnetite

Fe3O4 (Iron(II,III) oxide)

Gneiss

Gneiss (Foliated Metamorphic Rock)