#ethiopia #wollo #wollo opal #ethiopian opal #minerals #crystals #geology #nature #rocks #sceince

#wollo #ethiopia #minerals #crystals #geology #nature #rocks #sceince #ethiopian opal #precious opal #wollo opal

#wollo #ethiopia #cabochon #mineralogy #silica #mineraloid #mineral #geology #gemstone #iridescence #play of colors #the earth story #diffraction