

















[Available for purchase on 5/6 at 10 PM JST] Australian Black Opal 6.558ct Loose Stone with Certification
Opal, a gemstone characterized by shimmering iridescent light. There are several types of opal, but among them, the red fire flickering in the pitch-black darkness of black opal is captivatingly beautiful. The body colors include black, blue, and gray. Photography is done using a penlight. This is a 6.5ct Australian black opal with a significant presence. You can enjoy its blue and green play-of-color. An appraisal certificate is included.
・Type: Loose stone (natural stone)
・Stone name: Black Opal
・Weight: 6.558ct
・Size: 17.7×13.2mm
・Shape: Oval cut
・Scratches/Chips: S
・Inclusions: -
・Remarks: ---
・Accessories: Appraisal certificate (JTL (Jewel Trading Laboratory)), loose stone case (if it doesn't fit, a zippered clear case)
* While we strive to ensure that the photos are the same color as the actual product, there may be slight differences in appearance due to lighting conditions during photography or your monitor environment. Also, some photos may be taken using a penlight.
* For information on scratches/chips, treatments, and inclusions, please refer here.
* For other frequently asked questions, please refer here.
karatz_item_id: 12562710
Choose options





















![[Restock on June 27th at 10 PM] Authentic Gemstone Encyclopedia 3D Stickers Vol. 1: The Big Five Gems](http://store.karatz.jp/cdn/shop/files/IMG_3658.jpg?v=1781061036&width=3384)
![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_fbc9c12a-d5e0-4c94-9d20-bbfb36fad717.png?v=1781513378&width=3000)
![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_1ee7abcc-c785-4fbd-899f-b5b6978964a7.png?v=1782794728&width=3000)
![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_7372b521-c1f6-4b48-8378-4ef004170822.png?v=1782796302&width=3000)
![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_b55eecef-85e7-452d-8e9b-0c3480fd174b.png?v=1782796906&width=3000)
![[Awaiting appraisal] "Sourced in Hong Kong - Limited 8 stones" Afghanistan Green Hauyne Loose Stone [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_b5c226ed-0d3a-47fc-886d-8a1b5cfbbab5.png?v=1782718065&width=3000)
![[On Sale June 6th at 10 PM JST] "Limited 13 Stones" Fluorite Gacha including flawed Koshu cut gemstones "Bulk Purchase Discount Available"](http://store.karatz.jp/cdn/shop/files/50_28755117-0a9d-4247-82f9-d24573a88140.png?v=1782350508&width=2268)
![[6/ 10 PM JST Release] 《Limited to 11 Stones》Bicolor Gemstone Gacha featuring Paraiba Tourmaline and Euclase 《Bulk Purchase Discount Available》](http://store.karatz.jp/cdn/shop/files/51_69f45db0-6569-4905-b7e3-c9430e518415.png?v=1782351935&width=2268)
![[Sales start 10 PM on 6/26] Limited to 30 sets: 1 in 10 is a pair of 2 stones - Zambian emerald loose stone (approx. 6x4mm, emerald cut) with deep color. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_7d2f620b-700f-46fb-846b-e73a39606c51.png?v=1782813430&width=3000)



















![[Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones](http://store.karatz.jp/cdn/shop/files/P4130575.jpg?v=1776126091&width=4000)