About Ethiopian Opal :-Precious opal mined in Ethiopia began entering the gem and jewelry market in 1994. This opal originated from a discovery made in the Menz Gishe District in the northern part of the Shewa Province. ... Much of the opal has a brown, red, or orange body color; however, yellow, white, and clear body colors are also found.Ethiopian opal once cut is highly stable. Being hydrophane it is absorbent and chemicals including hair products, dyes, oils and lotions should be avoided. Change in body color to more reddish orange in highly transparent slightly orange Ethiopian opal has been seen on rare occasion.