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shells - jewels of the sea

nautilus

pearl nautilus shell pendant on peacock pearls

compositioncalcium carbonate, similar to abalone, coral, paua and pearl
color sourcecaused by light being refracted within the crystal layers of the shell, as well as diet and genetic factors
significant sourcesrivers, streams, lakes, and oceans and many other places
MOH scale2.5
care and treatmentShell, composed of calcium carbonate, is fragile. Wash gently with warm water and a mild soap. Do not clean in an ultrasonic jewelry cleaner as the cleaning agents are far too harsh for organic materials.