
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.







![[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/2026-09-1921.51.02.png?v=1789822311&width=1228)

![[On sale 9/18 at 22:00] <limited to stones> Single loose Sri Lankan sapphire (pear-shaped cut, avg. 0.25ct) <multi-buy discount available></multi-buy></limited>](http://store.karatz.jp/cdn/shop/files/P9090106_8608f520-da32-4c08-9862-78d94c76d481.jpg?v=1789650615&width=4000)

![[Available 9/12 at 10 PM] 《Limited to 10 stones》 Gemstone Gacha featuring top-color benitoite (regularly 32,800 yen), Saint-J blue zircon, and other gems with beautiful fire 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/collage_cef71878-5df4-47a3-9161-a0110c6af502.png?v=1789017207&width=2000)


![Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_5472c69b-0636-4749-974f-1fbf9262ca13.png?v=1788428702&width=2000)
![Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_e2bd3d60-9a2b-4f1b-8809-244107dfa192.png?v=1788427045&width=2000)
![[Limited to 6 stones] Rainbow Aquamarine 1 stone loose (avg. 0.7ct) [Multi-purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_3cd1a593-5338-4045-9b68-0bab29772f85.png?v=1788413082&width=2000)
![[Limited to 6 stones] Rainbow Aquamarine 1 stone loose (avg. 0.7ct) [Multi-purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_109399e6-70f2-460c-8ef0-532562ba2f88.png?v=1788412651&width=2000)




![[Sales start 9/5 at 10 PM] 《Limited 5 stones》 Raw Colombian Emerald (avg. 0.52ct) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/collage_68441094-4f47-4551-9052-eb22f03449c7.png?v=1788334683&width=2000)



![[Sales start 8/29 at 22:00] <limited to stones> Purple Scapolite, including Koshu Kiseki Kiriko Purple Scapolite (regular price 59,800 yen), with 1 free Tanzanite stone by Mr. Sange included <multi-purchase discount available></multi-purchase></limited>](http://store.karatz.jp/cdn/shop/files/collage_4ea69f7b-122e-4810-9296-f1a09323b7b2.png?v=1787921124&width=2000)
![[8/ 10 PM Sale] Amethyst Gacha Featuring Dandelion Cut Gemstones by Shimizu Kisaki - 12 Limited Pieces Available! (Multiple Purchase Discount)](http://store.karatz.jp/cdn/shop/files/2026-08-2717.26.42.png?v=1787819224&width=1285)
![Limited to 10 stones: Madagascar pink sapphire (heart-shaped, including padparadscha color, approximately 3 x 2.3 mm) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_cc2c84c4-e3e6-456b-a833-65c44967ef99.png?v=1787811529&width=2000)
![Limited to 10 stones: Madagascar pink sapphire (heart-shaped, including padparadscha color, approximately 3 x 2.3 mm) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_af0c773f-5960-4051-9ae9-82d3098c4584.png?v=1787791015&width=2000)

![[On sale May 29th at 10 PM] "Checker x Sui" Koshu Kiseki Cut Mexican Fire Opal (usually 79,800 yen) Gacha with only 10 stones available. Win a Fire Opal (and receive one Contraluz!). [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/P8190645.jpg?v=1787385497&width=4000)
![[On sale August 23rd at 10 PM] Limited 10 Stones! Amethyst Gacha featuring Koshu-Kiseki-Kiriko-plus-three "Akatsuki" (with one citrine cut by Mr. Sandje) [Multiple Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/collage_f4ace2f9-5fe7-4ba7-ad87-22a174e398a0.png?v=1787354382&width=2000)

![Limited to 10 stones: Madagascar pink sapphire (heart-shaped, including padparadscha color, approximately 3 x 2.3 mm) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_e3bc2b9c-c542-42ee-9a4d-e3f647d927ae.png?v=1787118079&width=2000)

![[Sale at 10 PM on 6/27] Limited to 9 Stones: Myanmar Red Spinel (Round Cut, approx. 3.5mm) - Multiple Purchase Discount Available](http://store.karatz.jp/cdn/shop/files/P1010244_3f90ad2e-80fe-42cd-8baa-52ea7f50e7c1.jpg?v=1782361127&width=4000)
![[On sale August 13th at 10 PM] Limited to 13 stones: 1 Indian Iolite Sunstone Gacha Stone (Long Hexagonal Cut or Pentagonal Cut) Average 0.35ct (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_ef38dd5f-55b6-45d5-8bda-690555ce1215.png?v=1786485076&width=2000)
![[Sales begin August 16, 10 PM] Limited to 11 Stones: Alexandrite Gacha with Russian Alexandrite and Brazilian Silky Color (usually ¥69,800), includes 1 bonus Alexandrite. [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_9892337f-3070-4ece-8fb8-c9cfffb79f3b.png?v=1786838211&width=2000)
![[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)
![[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)
![[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 8/12, 10 PM] "Limited to 10 stones" Strong Fire Gem Gacha featuring 3mm Benitoite and Blue Zircon, normally 42,800 yen (multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_278d67ff-f62b-4a8b-9e44-16602ef86502.png?v=1786093945&width=2000)
![[On sale 8/14 at 10 PM] Limited to 10 Stones: Rhodolite Garnet Gacha with a chance to win a "Dandelion Cut 9mm" collaboration with Shimizu Kiseki, normally 35,800 yen (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_abed9b2b-ac4c-4452-88c2-7d77a5f3cf83.png?v=1786091553&width=2000)
![[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_ee8309d3-5bb0-4cb8-b162-fd9ce98dae4e.png?v=1785924238&width=4000)
![[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 August 1 at 10 PM] Limited 10 Stones: Sapphire Gacha (including unheated cornflower blue sapphires, normally ¥69,800), with a bonus Sange sapphire. Multiple purchase discount available.](http://store.karatz.jp/cdn/shop/files/79.png?v=1785150857&width=4000)
![[Limited to 4 Stones] Sri Lanka Kolonna Dunilite - All Stones with Gemstone ID Report [Bulk Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/78.png?v=1785150180&width=4000)
![[On sale August 2nd at 10 PM JST] Limited to 15 stones: Peridot Gacha (August birthstone gacha) including a certificated parasitic peridot, normally ¥79,800. 1 stone with a free princess-cut peridot. Multiple purchase discount available.](http://store.karatz.jp/cdn/shop/files/collage213.png?v=1785476632&width=4000)

