
















Sri Lankan Blue Sapphire 0.519ct Loose
The famous stone sapphire is a well-known gemstone. It is made from the same mineral corundum as ruby, but all corundum other than red is called sapphire. This is the most orthodox blue sapphire. Sapphire is the second hardest gemstone after diamond with a hardness of 9, and is tough, stable, and easy to care for.
Cut by Sri Lankan cutter Sanjay.
Type: Loose (natural stone)
・Stone name: Blue sapphire
Weight: 0.519ct
・Size: 5.3×4.0mm
Shape: Custom cut ・Scratches/chips: S
Inclusions: S
Note: Heating is in progress.
*Sapphires are generally gemstones that have been heated.
・Accessories: Caratz quality guarantee, loose case (if it does not fit, a clear zip case)
▷For more information about sapphire
Sapphire characteristics, types, characteristics by origin, counterfeits, value standards, etc.
▷Jewelry processing available
If you would like to have your item made into jewelry, please order it along with your desired setting using the link below.
・[Select by stone] Simple order
・[Select from stones] Semi-custom
*If you would like an image of the stone in the frame, would like to discuss a full order, or have any other concerns or questions, please feel free to contact us here .
*Raw stones are not available. There are also some stones that cannot be handled.
*We try to make the colors in the photos as close as possible to the actual product, but they may look slightly different from the actual product depending on the lighting conditions at the time of shooting and the monitor environment you are using. Also, some photos may have been taken using a penlight.
*For information on scratches, chips, treatments, and inclusions, please click here .
*For other frequently asked questions, please click here .
karatz_item_id: 12552315
Type: Loose (natural stone)
・Stone name: Blue sapphire
Weight: 0.519ct
・Size: 5.3×4.0mm
Shape: Custom cut ・Scratches/chips: S
Inclusions: S
Note: Heating is in progress.
*Sapphires are generally gemstones that have been heated.
・Accessories: Caratz quality guarantee, loose case (if it does not fit, a clear zip case)
▷For more information about sapphire
Sapphire characteristics, types, characteristics by origin, counterfeits, value standards, etc.
▷Jewelry processing available
If you would like to have your item made into jewelry, please order it along with your desired setting using the link below.
・[Select by stone] Simple order
・[Select from stones] Semi-custom
*If you would like an image of the stone in the frame, would like to discuss a full order, or have any other concerns or questions, please feel free to contact us here .
*Raw stones are not available. There are also some stones that cannot be handled.
*We try to make the colors in the photos as close as possible to the actual product, but they may look slightly different from the actual product depending on the lighting conditions at the time of shooting and the monitor environment you are using. Also, some photos may have been taken using a penlight.
*For information on scratches, chips, treatments, and inclusions, please click here .
*For other frequently asked questions, please click here .
karatz_item_id: 12552315
Choose options

















Sri Lankan Blue Sapphire 0.519ct Loose
Sale price¥14,800
Regular price







![[On sale August 15th at 10 PM] Paraiba Gacha where you can win a Brazilian Paraiba Tourmaline (CuO: 1.4%, MnO: 2.7%) normally priced at 39,800 yen, limited to 10 stones. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_a0ff6ff6-cfc6-4b64-bdac-9956db0ceb16.png?v=1786092530&width=2000)
![[On sale 8/15 at 10 PM JST] Colombian Emerald Gacha featuring Shimizu Kisaki's 8mm Clover In-cut (regularly 79,800 JPY) - only 15 stones available! (Bonus green beryl included) [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/81.png?v=1785982219&width=1890)
![[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/2026-08-0815.46.27.png?v=1786171616&width=1274)
![[On sale August 14th, 10 PM] Limited 10 pieces: Zimbabwe Mint Fluorite Single Stone Loose (average 2.2ct) [Bulk purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_c70b65a7-64c4-4d4b-a6be-3d893c5cc2ad.png?v=1786091316&width=2000)
![[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/2026-08-0914.54.51.png?v=1786254915&width=1346)






![[Published 12563989] Colombian Non-Oil Emerald 0.034ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P7313813_c6213cfc-19f3-42d7-be51-5508ac2480f1.jpg?v=1786658898&width=2074)
![[Published on 12563914] Loose Colombian Pyrite and Mica in Emerald, 0.614 ct](http://store.karatz.jp/cdn/shop/files/P7290563.jpg?v=1785318584&width=4000)











![[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)