Lake Superior Agate
Cryptocrystalline Quartz (SiO2)
Category
Browse sedimentary (microcrystalline quartz) specimens identified by the Rock Identifier community.
Lake Superior Agate
Cryptocrystalline Quartz (SiO2)
Quartzite (River Pebble)
SiO2 (recrystallized Quartz)
Red Jasper
Jasper (a variety of Chalcedony, SiO₂)
Quartz (Citrine or Iron-Stained variety)
Silicon Dioxide (SiO2)
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Schist with Quartz
Mica Schist (contains Muscovite/Biotite and Quartz SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Rough Quartz (or Quartzite pebble)
Silicon Dioxide (SiO2)
Pink Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (primarily SiO2)
Agate
Silicon Dioxide (SiO2)
Blue Lace Agate (Banded Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Milky Quartz
Silicon Dioxide (SiO2)
Quartzite Pebble
Quartzite (primarily SiO2)
Green Aventurine (Green Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
Clear Quartz (or Rock Crystal)
Quartz (SiO₂)
Chert (v. Flint)
Sedimentary Cryptocrystalline Quartz (SiO2)
Chert (variably Oolitic or Fossiliferous)
Sedimentary Cryptocrystalline Quartz (SiO2)
Quartzite
Quartzite (SiO2)
Ocean Jasper
Orbicular Jasper / Silicate
Sandstone
Arenite (SiO2 based)
Quartz
Silicon Dioxide (SiO2)
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide with inclusions (SiO2)
Quartz
Quartz (SiO₂)
Pyrite
Iron Sulfide (FeS2)
Dendritic Agate or Tree Agate
Silicon Dioxide (SiO2) with impurities of manganese or iron oxide
Aura Quartz Geode
Titanium/Gold bonded Quartz (SiO2 with metallic coating)
Quartz Pebble (Iron-stained)
Silicon Dioxide (SiO2)
Quartz (White/Milky)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (predominantly SiO2)
Quartzite
Quartzite (SiO2)
Red Jasper
Jasper (Silicon Dioxide) - SiO2
Clear Quartz
Silicon Dioxide (SiO2)
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (chiefly SiO2)
Quartzite
Quartzite (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
White Quartz
Quartz (SiO2)
Quartzite
Quartzite (primarily SiO2)