![[On Sale August 2nd at 10 PM JST] Limited to 12 Stones: Blue Gemstone Gacha (Paraiba Tourmaline, Euclase, Tanzanite, etc.) + 1 Aquamarine Stone Included (Bulk Purchase Discount Available)](http://store.karatz.jp/cdn/shop/files/77_ede25372-0894-4b5d-ac9c-3b1ca2b56c4f.png?v=1785146266&width=4000)
![[Limited to 24 stones] Oregon Sunstone from America with beautiful Schiller (Oval cut, 5 x 7mm) [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_50cccb1a-7282-4487-ae6d-b6447e9885ee.png?v=1785119892&width=3000)
![[Sales start 10 PM, Aug. 10] Andesine-Labradorite Gacha with a Chance to Win a Dandelion Cut Worth 69,800 JPY (Limited to 12 Stones) (Plus 1 Andesine-Labradorite Stone) [Bulk Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/collage_9d631197-f87c-42dd-94c8-54df7bf67e47.png?v=1786088702&width=4000)
![[On sale July 24 at 10 PM] Limited to 5 stones: Andesine-Labradorite (Rainbow Moonstone) from Balangoda, Sri Lanka (Pear Shape Buff Top Cut, 5.0x3.0mm) - 1 Loose Stone (Multi-purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_81278a10-2271-47ca-aa76-74cf03ec312c.png?v=1784701906&width=3000)
![[Sales begin July 24 at 10 PM] Limited 5 Stones: Moonstone from Mitiyagoda, Sri Lanka (June Birthstone, Round Buff-Top Cut, 4.0mm) - 1 Loose Stone [Multiple Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/collage_f0bd4330-0217-47fd-88f4-e6604c1c4eae.png?v=1784701179&width=3000)
![[On sale August 12th at 10 PM] "Limited to 15 Stones" Diamond Gacha featuring rare butterfly-cut diamonds "Multiple Purchase Discount Available"](http://store.karatz.jp/cdn/shop/files/2026-08-0717.06.55.png?v=1786090036&width=1279)
![[On sale July 24 at 10 PM] Limited to 5 stones: Moonstone from Madiyagoda, Sri Lanka (June birthstone, oval buff top cut, 5.0x4.0mm), 1 loose stone. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_0c9ec17a-a7f0-41f2-8f40-1dca2677abfc.png?v=1784701731&width=3000)
American Herkimer Diamond (Rock Crystal) 5.5mm/0.534ct Loose
Sale price¥8,800
American Herkimer Diamond (Rock Crystal) 5.3mm/0.594ct Loose
Sale price¥7,980
Brazilian dumortierite in quartz 0.731ct loose
Sale price¥5,980
![[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)
[12564094 listed] Afghanite from Afghanistan 0.018ct Loose
Sale price¥5,980
[Listed on 12563931] Australian Opal 0.674ct Loose Gemstone
Sale price¥8,800
[Listed as 12563592] Red Coral 0.908ct Loose Stone
Sale price¥9,800
![[Listing 12563591] Blood Coral 1.400ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P1010911_952b0a10-5e4d-4933-8f39-76f097828be3.jpg?v=1786839522&width=3230)
[Listing 12563591] Blood Coral 1.400ct Loose Stone
Sale price¥9,800
[12563927] Sweet Home Mine Rhodochrosite 0.104ct Loose Stone
Sale price¥8,800
0.522ct bicolor sapphire loose stone from Madagascar
Sale price¥6,980
![[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)
[Option] Certificate issuance fee
Sale priceFrom ¥2,750
![[Jeweler's Tools] White penlight (for loose), loose 3-piece set](http://store.karatz.jp/cdn/shop/files/P1010939_d2032b55-e8e4-4e38-a15d-14d2ee8092f5.jpg?v=1776421761&width=4000)
[Jeweler's Tools] White penlight (for loose), loose 3-piece set
Sale price¥5,980
![[On sale June 28th at 10 PM] Brazilian Paraiba Tourmaline Gacha with sorting results (CuO: 2.1%, MnO: 2.2%), usually ¥45,800, now with a chance to win one of 18 limited stones. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_6bc80329-36ed-4bc7-bbff-5c77e00a25bd.png?v=1782393589&width=3000)
![[On sale June 21st at 10 PM] Ruby Gacha (with synthetic ruby as a bonus) including two pigeon blood rubies with appraisal certificates (limited to 15 stones) - Multiple purchase discount available](http://store.karatz.jp/cdn/shop/files/46_64e5d430-259e-4ae1-9011-7948956733ef.png?v=1781501306&width=1890)
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.