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 opals has agglomerated plants/Roots (fossils). Fossil plants dating back to the Miocene period (15 million years old), enclosed within a stunning, pre-polished opal with a very beautiful colors! Fossil inclusions in Indonesian opal are rarer than those in Ethiopian opal. Natural crystal opal Pre-polished Beautiful colors Indonesian, Banten Very rare with plant/root inclusion Miocene ( 15 million years ago ) Multicolor 1.15 cts - 0.23 grams 4 pieces from 6 to 7 mm about Photos of wet pieces because the final polishing is missing the piece for sale is what you see in photos! please be careful with the description and measures COMBINED SHIPPING (if you buy more items in the same auction you only pay 1 shipment) Standard shipping (2-7 days for Italy) (10-20 days for Europe) ( 15-40 days for rest of the world ) if you want fast shipping, please contact me immediately after the auction win