Opal in principle is a liquid silica, which solidifies over millions of years, forming the opal, in some rare cases, some biological remains are incorporated into the silica, giving life to a masterpiece of nature. In this case, this opal has agglomerated plants/Roots (fossils). Natural opal rough Ethiopian Welo Untreated! Beautiful Color Multicolor flash fire 1 piece Size: 26 x 23 x 15 mm about 7.4 grams - 37 cts Crack Photo with lamp light condition! beautiful colors also sunlight! Wet Piece - Photo wet piece Keep moist please be careful with the description and measures Standard shipping ( 2-7 days for Italy ) ( 10-20 days for Europe ) ( 15-45 days for rest of the world )