Gold in Quartz Matrix
Native Gold (Au) with Quartz (SiO2) and Slate/Shale
Category
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
Gold in Quartz Matrix
Native Gold (Au) with Quartz (SiO2) and Slate/Shale
Flint (or Chert)
Silicon dioxide (Microcrystalline Quartz, $SiO_2$)
Banded Chert
Silicon Dioxide (SiO2)
Quartz / Quartzite Pebble
Silicon Dioxide (SiO2)
Quartzite Pebble
Quartzite (SiO2)
Quartzite
Quartzite (SiO2 with impurities)
Quartzite Pebble (River Rock)
Quartzite (primarily SiO2)
Quartzite
Quartzite (SiO2)
Yellow Quartzite (River Cobble)
Quartzite (SiO2)
Quartzite
Quartzite (mainly SiO2)
Quartzite (River Pebble)
Meta-quartzite (composed primarily of SiO2)
Quartzite (River Cobble)
Metamorphosed Quartz Sandstone (SiO2)
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
Blue Kyanite
Kyanite (Al2SiO5)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz (Field Stone)
Silicon Dioxide (SiO2)
Eclogite
Eclogite (Omphacite-Garnet rock)
Quartzite
Quartzite (Primary mineral: SiO2)
Quartzite
Quartzite (SiO2 silicon dioxide)
Quartzite
Quartzite (SiO2)
Yellow Quartzite Pebble
Quartzite (primarily SiO2)
Soapstone (Steatite) carving
Steatite (primarily Talc, Mg3Si4O10(OH)2)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Quartz pebble
Quartz (SiO2)
Chrysotile Asbestos
Chrysotile [Mg3Si2O5(OH)4]
Milky Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartzite
Quartzite
Agate
Silicon dioxide (Chalcedony), SiO2
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Marble
Recrystallized Calcite (CaCO3)
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)
Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein
Native Gold (in earring form)
Gold (Au)
Chert (varieties including Flint or Jasper)
Microcrystalline Quartz (SiO2)
Greenschist (or Serpentinite with Manganese Dendrites)
Greenschist facies metamorphic rock
Chrysotile Serpentine (Asbestos in Matrix)
Chrysotile Mg3Si2O5(OH)4
Dyed Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
Chert / Flint
Silicon Dioxide (SiO2)