Metamorphic, Likely Sedimentary With Quartz Veins

Quartz (clear quartz/crystal quartz)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Likely quartz crystal fragment

Quartz (SiO₂), possibly a small tumbled or cleaved fragment

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz-rich quartzite or silicified stone

Quartzite; predominantly microcrystalline quartz (SiO₂), with minor iron-oxide staining and possible feldspar/clay impurities

Quartz (Gravel Pebble)

Silicon Dioxide (SiO2)

Weathered sandstone or iron-rich sedimentary fragment

Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂-dominant)

Gneiss (likely)

Gneiss

Tumbled quartz (likely milky/clear quartz)

Quartz, silicon dioxide (SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Serpentinite with Calcite Veins

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Schist with Quartz Veins

Schist with Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (SiO2)

Tumbled white quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Mixed pebble collection, including likely flint, quartzite, and fossil material

Varied silicate rocks; visible specimen may include chert (microcrystalline SiO₂), quartzite, and a possible fossil

Milky Quartz

Silicon Dioxide (SiO2)

Calcite (likely honey/orange calcite)

Calcite — calcium carbonate, CaCO₃

Pyrite in Quartz Matrix

Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)

Quartz with Epidote

Silicon dioxide (SiO2) with Calcium aluminum iron silicate (Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Mixed polished river stones

Likely quartz, quartzite, chert/jasper, and possibly limestone or marble

Milky Quartz

Silicon Dioxide (SiO2)

Tumbled yellow chalcedony (likely citrine or yellow quartz)

Quartz, SiO₂; potentially microcrystalline chalcedony

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Quartzite

Metamorphic Quartz (SiO2)

Quartz (Rose or Milky Quartz)

Silicon Dioxide (SiO2)

Greywacke (River Pebble)

Greywacke sandstone with quartz veining

Banded limestone or marble

Calcite-dominated carbonate rock; likely banded marble (CaCO₃)

Quartzite River Rock

Quartzite (SiO2)

Blue-green raw mineral specimen, likely apatite

Fluorapatite, Ca₅(PO₄)₃F (probable; visual identification only)

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Magnetite or Ironstone Nodule

Magnetite (Fe3O4) or Hematite-rich Sedimentary Nodule

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)