5.94ct Solid Black Opal Blue Green Oval Lightning Ridge. For your consideration is a fantastic. Solid black (N4) opal from Lightning Ridge, Australia. It features very bright, (4/5) non-directional blue and emerald green in a classic broadflash pattern with a little chaff. This low-top, oval-cut gem weighs 5.94 carats.It measures 18mm long by 14mm wide by 3.5mm high. 100% crack free, blemish-free face-up. There is a slight window on one edge due to some clay on the back. This is an untreated, ALL-NATURAL gemstone. PLEASE NOTE: you are looking at enlarged images of a small gemstone. Flaws or blemishes may not be visable to the naked eye! White lines or spots are reflections from the highly polished surface. 5.94ct Solid Black Opal Blue Green Broadflash Oval Lightning Ridge" is in sale since Friday, April 23, 2021. This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Opal\Black Opals". The seller is "opalobsession" and is located in Nashville, Tennessee. This item can be shipped worldwide.