Ethiopian opals are hydrophane opals which means they were created as a result of volcanic activity, forming in nodules within the volcanic ash in stratum between rhyolite layers. It's important to remove your Ethiopian Opal Ring before doing dishes, showering, getting into the ocean or pool, or any other water-based activities: that's because its hydrophane qualiity means it absorbs water easily! This could potentially dull your Ethiopian opal's glittering rainbowy shine.