Metamorphic Rock (Composed Of Multiple Minerals)

Nephrite Jade

Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Quartz (Quartzite fragment)

Silicon Dioxide (SiO2)

Amygdaloidal Basalt

Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Ironstone Concretion (Limonite/Goethite)

Goethite-rich Concretion (FeO(OH))

Blue Lace Agate (Banded Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartzite River Rock

Quartzite (primarily SiO2)

Spondylus Oyster Calcification / Fossilized Oyster

Spondylus (Thorny Oyster) / Calcium Carbonate (CaCO3)

Greenstone or Chlorite Schist

Greenschist / Chlorite schist

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite (River Cobble)

Quartzite (predominantly SiO2)

Quartz

Quartz (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Bumblebee Jasper

Calcite-bearing Volcanic Tuff containing Sulfur and Arsenic (Orpiment/Realgar)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Ruby

Corundum (Al2O3 with Chromium trace impurities)

Magnetite

Magnetite (Fe3O4)

Red Sandstone (Hematitic)

Clastic sedimentary rock (SiO2 with Fe2O3 inclusions)

Basalt with Iron Oxidation

Vesicular Basalt (Aphanitic Mafic Igneous Rock)

Limonite-stained Quartzite

Quartzite with Limonite (FeO(OH)·nH2O) staining

Red Quartzite

Quartzite (SiO2)

Chert (Nodule)

Chert (composition: SiO2)

Serpentinite

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

Olivine (Peridotite)

(Mg, Fe)2SiO4 (Magnesium Iron Silicate)

Petrified Wood

Silicified Wood (SiO2)

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Garnet

Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Amygdaloidal Basalt

Amygdaloidal Mafic Volcanic Rock

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Unakite

Unakite (Epidotized Granite)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Greenstone / Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)