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rockon-ro:PETRIFIED WOOD from the Chinle Formation of Arizona....

rockon-ro:KYANITE (Aluminum Silicate) crystals with milky...

rockon-ro:SCOLECITE (Hydrated Calcium Aluminum Silicate)...

rockon-ro:PURPURITE (Manganese Phosphate) from the Ross...

rockon-ro:QUARTZ (Silicon Dioxide) crystal cluster from...

rockon-ro:BLUE ANDEAN OPAL from Peru.

rockon-ro:BLUE HALITE from the Devonian Prairie Evaporite...

rockon-ro:CELESTITE (Strontium Sulfate) from Bombetoka Bay,...

rockon-ro:SEPTARIAN NODULE slab from Utah, USA. Golden creamy...

rockon-ro:MIMETITE (Lead Chloroarsenate). Yellow mimetite on...

rockon-ro:Rhodochrosite (Manganese Carbonate) from...

rockon-ro:CHRYSOCOLLA and MALACHITE (Copper Silicate/Carbonate) from Chihuahua, Mexico. Emerald gree

rockon-ro:CHALCANTHITE (Copper Sulfate) crystals that were grown in a laboratory by allowing a satur

rockon-ro:PETRIFIED WOOD from the Chinle Formation of Arizona. Colors are dependent on the chemistry

rockon-ro:SODALITE (Na-Al Silicate Chloride) from Namibia, Africa. Deep blue massive sodalite with w

rockon-ro:SODALITE (Na-Al Silicate Chloride) from Namibia, Africa. Deep blue massive sodalite with w

rockon-ro:PYRITE (Iron Sulfide on Marl) from Logrono, Spain (cubic crystal).

rockon-ro:LABRADORITE from Madagascar.

rockon-ro:Cleoniceras ammonites from the Albian stage of the Cretaceous from Madagascar. 150 million

rockon-ro:SODALITE (Na-Al Silicate Chloride) from Namibia, Africa. Deep blue massive sodalite with w