![[On sale May 16th at 10 PM JST] 《Limited 20 stones》Big Gem Gacha 💎 Win a 19ct up Shimizu Kisaki Co. Camellia cut gem 《Multiple purchase discount available》](http://store.karatz.jp/cdn/shop/files/29_3ffd0a54-a2f0-4da2-8c96-7e3b49f7f4f6.png?v=1778380623&width=1890)
![Bungo and Alchemist x KARATZ Collaboration Jewelry Vol. 4: Bungo Ring [Ango Sakaguchi Model Ring]](http://store.karatz.jp/cdn/shop/files/bungou_pt4_bnr_03b_1080x1080_0583a7bf-27be-4ac0-b5cf-9654b94847b7.jpg?v=1779787573&width=1080)
![[Sale on May 5th at 10 PM JST] 💎Brown Diamond Gacha with Appraisal Certificate - 11 Stones Only! (Multiple Purchase Discount Available)](http://store.karatz.jp/cdn/shop/files/collage_de88d9bd-1ddf-428b-9972-bf7355074823.png?v=1779847160&width=4000)
![[On sale May 24th, 10 PM JST] 💎 Diamond Gacha with Appraisal Certificate! Get D/VS-1/3.4mm or I/VS-1/3.7mm diamonds, normally 29,800 yen! Limited to 15 stones. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/33.png?v=1779065096&width=1512)
![[On sale 5/ at 10 PM] 《Limited to 13 Stones》 VVS-2 Sorted Yellow Diamond Gacha 💎 《Bulk Purchase Discount Available》](http://store.karatz.jp/cdn/shop/files/34.png?v=1779067923&width=1890)
![[Sale starts May 24th, 10 PM JST] 9 Limited Edition Kochi Prefecture Red Coral Branches (Rough) (1 Piece) (March Birthstone, Coral, average 6.5ct) (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/P5210045.jpg?v=1779351573&width=4000)
![Bungo and Alchemist x KARATZ Collaboration Jewelry Vol. 4: Bungo Ring [Chuya Nakahara Model Ring]](http://store.karatz.jp/cdn/shop/files/bungou_pt4_bnr_03a_1080x1080_188850d0-864d-433e-aee2-4c42cc37704d.jpg?v=1779787581&width=1080)
![[On sale May 10th, 10 PM JST] 《Limited 4 Stones》Madagascar Pezzottaite Loose Stone (Round Cut, approx. 3mm) cut by Mr. Sanje 《Multi-purchase discount available》](http://store.karatz.jp/cdn/shop/files/P5070774.jpg?v=1778310124&width=4000)
![[5/ 10 PM Sale] Limited to 10 Stones: Koshu-Kiseki-Kiriko "Checker x Sui" Mexican Fire Opal Gacha 💎 (Bulk Purchase Discount Available)](http://store.karatz.jp/cdn/shop/files/27_82a970f3-f0af-4a8f-b088-2b2a73e4e17f.png?v=1778314244&width=1890)
![[On sale May 16th at 10 PM JST] Limited to 10 stones! Cat Cut Gacha 💎 Tourmaline, Opal, Chalcedony, etc. (Includes a bonus mini-mini cat cut stone) (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/28_bc4803b4-5e4e-4a51-b5c9-60df2c8819e2.png?v=1778377827&width=1890)
![[On sale May 23rd at 10 PM] Limited 12 Stones: Russian Phenakite Single Stone Loose (average 0.35ct) - Multiple Purchase Discount Available](http://store.karatz.jp/cdn/shop/files/P5150061_b71a0087-6639-4386-bec2-ec1eea504c4f.jpg?v=1779329903&width=4000)
![[On sale May 23rd, 10 PM] "Limited 7 Stones" Kochi Prefecture Blood Coral Loose Gemstones (Oval Cut, 4x6~7mm) "Multi-purchase discount available"](http://store.karatz.jp/cdn/shop/files/P5210043_c0fa32b1-c95e-4019-8fc7-8a9735d549cd.jpg?v=1779352430&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/2026-06-0412.31.27.png?v=1780543913&width=1282)
【6/6 22時販売】《限定3石》通常59,800円を含むFANCYカラー含む天然ピンクダイヤモンド《複数購入割引有》
Sale price¥22,000
![[On sale 5/23 at 10 PM] Limited to 5 stones: Burmese Ice Jadeite (approx. 3.3-3.8mm) - Multiple purchase discount available](http://store.karatz.jp/cdn/shop/files/P5150084.jpg?v=1778975404&width=4000)
![[On sale May 22, 10 PM JST] "Limited to 11 Stones" Andalusite from Madagascar (cut by Mr. Sanje) Gacha - Average 0.40ct "Multiple Purchase Discount Available"](http://store.karatz.jp/cdn/shop/files/P5150115.jpg?v=1778976029&width=4000)
Goshenite 0.846ct loose stone
Sale price¥7,980
[Sales begin May 18 at 10 PM JST] [Colorflee] Pt900 Diamond 0.50ct Ring
Sale price¥79,800
[On sale May 10th at 10 PM] Tanzanian Tanzanite 0.406ct Loose Stone
Sale price¥12,800
![[On sale May 10th at 10 PM] "Limited 11 Stones" Brazilian Mica in Rose Quartz (1 stone) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/P5070637.jpg?v=1778245542&width=4000)
![[On sale May 10th, 10 PM JST] 6 Limited Pieces - Brazilian Mica in Rose Quartz (One stone), Multiple Purchase Discount Available](http://store.karatz.jp/cdn/shop/files/P5070688.jpg?v=1778245850&width=4000)
Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.
So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.
KARATZ's Initiatives and Social Contributions
We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.
KARATZ Books
These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.
jeweler's tools
For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.