ITEM DESCRIPTION: Unlike any other opal you will see in this price range! This precious black opal is surrounded in a sea of white.I've never seen an example like this before. Would be perfect for a ring or pendant! GEM: Semi Black Opal Lightning Ridge Australia. MEASUREMENT: 16.3mm x 14.7mm x 4.2mm. 14 3 14 - YouTube. The item "Crazy Pattern 6+ Carat Australian Black Opal Lightning Ridge MUST SEE VIDEO" is in sale since Wednesday, June 10, 2020. This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Opal\Black Opals". The seller is "aituzzijewelry" and is located in Hawleyville, Connecticut. This item can be shipped worldwide.