











[On sale 7/22 10 PM JST] 1.585ct Blood Red Coral Loose Stone from Kochi Prefecture
This is oxblood coral collected off the coast of Kochi Prefecture, one of Japan's leading coral producing regions. Its deep, rich red color is highly prized among all corals, which is why it is called "oxblood."
This oxblood coral was purchased directly from an oxblood coral dealer in Kochi Prefecture. It was polished by a skilled craftsman in Kochi Prefecture.
*Although it may appear brighter in the photos, it is actually a deeper, richer red. Please enjoy the subdued color unique to oxblood coral.
・Type: Loose stone (natural stone)
・Stone name: Oxblood coral
・Weight: 1.585ct
・Size: 11.8 x 6.4mm
・Shape: Cabochon cut
・Scratches/Chips: S-A+
・Inclusions: -
・Remarks: ---
・Accessories: KARATZ quality certificate, loose stone case (clear case with zipper if it doesn't fit)
▷Jewelry customization available
If you wish to customize your jewelry, please order with your desired setting from the link below.
・Simple Order [Choose from stones]
・Semi-order [Choose from stones]
*If you would like an image of the stone on a setting, would like to discuss a full custom order, or have any other questions or inquiries, please feel free to contact us here.
*Rough stones are not supported. Also, some stones may not be supported.
* We strive to make the photos the same color as the actual product, but due to the lighting conditions during shooting, your monitor environment, etc., the actual product may look slightly different. In addition, some photos may be taken using a penlight.
* For products that include UV fluorescent photos, they are taken using a black light with a wavelength of 365nm. If you use a light with a different wavelength (e.g., around 395nm), the fluorescence may appear weak or be difficult to confirm. The black light we use is here.
* Please refer to here for information on scratches, chips, treatments, and inclusions.
* For other frequently asked questions, please refer to here.
karatz_item_id: 12563446
Choose options


















![[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/2026-08-0914.21.02.png?v=1786252887&width=1343)
![[Use the #202509 Campaign] 2025 New Year's Lucky Bag 🎍 Gem Gacha Lucky Bag with 4 or more gemstones (worth ¥25,000) [Discount for bulk purchase of lucky bags]](http://store.karatz.jp/cdn/shop/files/gazou.png?v=1785994448&width=1254)
![[On Sale 10 PM, June 7] *Limited to 3 Sets* 1.0ct/D/VS-VVS/IDEAL Lab-Grown Diamond (Synthetic Diamond) & 2 Rare Cabochon Stones (Total of 3 Stones Included) *Multiple Purchase Discount Available*](http://store.karatz.jp/cdn/shop/files/collage_07f6900d-fa8d-4bc4-acda-dc4cf0e8fed7.png?v=1785923452&width=4000)
![[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_0f6126db-fe6e-4ec4-ab15-e86a0e08371b.png?v=1786253811&width=2000)
![[Posted on 12563959] Madagascar Padparadscha Sapphire 0.164ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P7241965_cec751e0-3766-4ff6-a740-715fc57f7e8e.jpg?v=1786398430&width=2936)




















![[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)