













































[On sale June 7, 10 PM] Untreated Blue Sapphire 2.430ct Loose Gemstone GIA
Sapphire is a well-known famous stone. This is the most common blue sapphire. With a hardness of 9, sapphire is second only to diamond in hardness, and it is also a durable and stable gemstone that is easy to care for. This is a rare unheated blue sapphire.
This is a large unheated sapphire of 2ct or more. You can also enjoy the bicolor effect depending on the angle. A GIA certificate is included.
・Type: Loose stone (natural stone)
・Stone name: Unheated blue sapphire
・Weight: 2.430ct
・Size: 7.9×5.9mm
・Shape: Cushion cut
・Scratches/Chips: A+
・Inclusions: –
・Remarks: ---
・Accessories: Appraisal report (GIA), loose stone case (zippered clear case if it doesn't fit)
* We try to ensure that the photos have the same color as the actual product, but due to lighting conditions during shooting and your monitor environment, the actual product may look slightly different. Also, some photos may be taken using a penlight.
* Please refer to here for information on scratches/chips, treatments, and inclusions.
* For other frequently asked questions, please refer to here.
karatz_item_id: 12562831
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)
![[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/collage_e24ee4a0-1bb9-4e19-9a6a-6fa75b4cf864.png?v=1782726871&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)