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opal-common - no 'play' today

yellow opal

pink opal pendant with pearls

compositionhydrated silica gel
name sourcefrom the fact that it does not have a "play of color"
other accepted namesmilk opal, and moss opal, potch
color white, gray, yellow, blue, green, pink
MOH scale5.5 - 6
care and treatmentWash carefully in warm soapy water but don't soak. Do not use an ultra sonic jewelry cleaner.