This untreated Ethiopian opal rough specimen is completely natural - just as it was found respectfully in the earth. ***The opal is transparent with a huge flawless area that would yield a 20 carat cabochon gem! The opal has amazing extra fine color-play in flashes of green, orange, red and blue colors as you turn it. ***This untreated opal specimen makes a superb mineral specimen of natural Ethiopian opal just as it is. This natural specimen of opal with matrix weighs 199.4 carats ***Ethiopian Opal Specimen Dimensions: 1.75" x 1.5" x 1.2" Mined ethically and respectfully in Ethiopia ***See also a side view of this Ethiopian opal extra fine rough specimen. This untreated opal specimen also makes a great mineral specimen of natural Ethiopian opal just as it is. ***Primary picture was taken inside under fluorescent lights, additional photos and video was taken outside under indirect sunlight, no filters or color enhanced was used on any pictures or video.. Opal is very popular today for metaphysical use - Opal is said to stimulates originality and creativity, also to helps release anger and claim self worth, aiding in expressing one's true self. Opal is also said to strengthens memory. The beautiful opal stone is the actual one you will receive. ***A Certificate of Authenticity from our main website mineralminers.com will accompany this unique item at no additional cost. If you would like to learn more about Opals, please copy and paste this link to our Opal Educational and Information Page; https://www.mineralminers.com/html/opal.htm At MineralMiners.com your satisfaction is our top priority! We guarantee Unique Items, Superb Energy and Collector Quality at Miner's Prices! ? Have a "Gem" day!