【9/20 22時販売】《限定13石》マダガスカル産アパタイト原石１石（平均3.8ct）《複数購入割引有》
Sale price¥1,580
【9/20 22時販売】《限定3石》ブラジル産モスグリーンベリルガチャ（平均0.8ct,ローズカット）《複数購入割引有》
Sale price¥2,980
【9/19 22時販売】《限定26石》パキスタン産オイルインクォーツ《複数購入割引有》
Sale price¥1,580
【9/18 22時販売】《限定13石》アフガニスタン産アフガナイト1石ルース（平均2.0ct,カボションカット）《複数購入割引有》
Sale price¥2,980
【9/18 22時販売】ブラジル産バイカラーシトリン 4.027ctルース
Sale price¥3,980
【9/18 22時販売】ブラジル産デンドリティックアゲート 1.056ctルース
Sale price¥3,980
![[On sale August 16th at 10 PM JST] Limited to 4 stones: Swiss Blue Topaz (Star of David/Hexagram Cut, approx. 8mm) [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_538f8612-0b8f-4695-9de5-c35b848960aa.png?v=1788921228&width=2000)
【9/7 22時販売】《限定10石》鑑定書付きダイヤモンドが当たるダイヤモンドガチャ（全石VSクラス相当）《複数購入割引有》
Sale price¥3,980
【9/7 22時販売】《限定10石》ラタナキリブルージルコン・2.4ctローズカットなどが当たるブルージルコンガチャ《複数購入割引有》
Sale price¥3,980
【9/5 22時販売】《限定4石》ローズカットのターコイズ（訳ありサンジェ氏カット,最大12mm）《複数購入割引有》
Sale price¥2,980
![[Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire](http://store.karatz.jp/cdn/shop/files/collage_bd83e868-fedf-4eb9-ab5d-dd5251559969.png?v=1788516975&width=2000)
Zimbabwean Apatite (UV type) 0.209ct loose stone
Sale price¥4,980
【9/6 22時販売】パキスタン産オイルインクォーツ 0.281ctルース
Sale price¥4,980
【9/7 22時販売】パキスタン産オイルインクォーツ 0.505ctルース
Sale price¥4,980
Tanzania Bicolor Zoisite 0.278ct Loose Stone
Sale price¥4,980
![[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/P8200827.jpg?v=1787563629&width=4000)
![[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/P8200767.jpg?v=1787563557&width=4000)
![[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/P8190691.jpg?v=1787563399&width=4000)
![[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/collage_7b7dc323-95d7-4adf-b87d-7f158eb4b182.png?v=1787295459&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/2026-08-2115.28.22.png?v=1787293728&width=1285)
![[On sale August 21st, 10 PM] "Limited to 20 stones" Sri Lankan Ratnapura Green Zircon Single Stone Loose Gemstone "Bulk purchase discount available"](http://store.karatz.jp/cdn/shop/files/P8070258.jpg?v=1787095598&width=4000)
![[On sale July 10 at 10 PM] Limited 8 stones: Sweet Home Mine rhodochrosite single loose stone (average 0.1 ct) [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/P1010374_a19b207f-12e5-4ee0-b72b-39e70511ba5b.jpg?v=1783557559&width=4000)
![[On sale July 20th at 10 PM] "Limited to 13 Stones" Diamond Gacha: Win a FANCY VIVID Yellow Diamond (with sorting report) worth 22,800 yen. One loose stone. (Multiple purchase discount available.)](http://store.karatz.jp/cdn/shop/files/collage_e8634dba-e7a3-4862-b6b3-003b0b13375c.png?v=1786839952&width=2000)
![[Sales start 8/13 10 PM] Limited to 12 Stones! Beryl Gacha where you can win a 12mm camellia-cut Limonite in Beryl or Santa Maria Aquamarine with a certificate of authenticity for 45,800 yen. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_42474086-f487-4265-a1d0-33fa7887cdea.png?v=1786090469&width=2000)
![[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)
![[Sale starts July 7 at 10 PM] Limited to 14 Stones: Special Cut Gacha [Bulk Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/75.png?v=1785113154&width=2268)
![[Sale starts 10PM on July 12] Limited 20 Stones: Grandidierite Single Stone Loose (Avg. 0.035ct) from Madagascar [Multiple Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/P1010194_ea02faf6-d812-4758-9e0c-262e6891b700.jpg?v=1783773075&width=4000)
![[Sale on 7/ at 10 PM] "Limited to 13 Stones" Madagascar Sapphirine, average 0.09ct "Multiple Purchase Discount Available"](http://store.karatz.jp/cdn/shop/files/P1010288_ec4000a1-014e-44e1-9b97-40f834b9e6e7.jpg?v=1783494963&width=4000)
![[Limited to 15 Gems] Forest Green with certificate, normally ¥29,800, Canary Yellow or Ice Blue treated diamond gacha, normally ¥22,800. [Multi-purchase discount available]](http://store.karatz.jp/cdn/shop/files/57.png?v=1783491547&width=1890)
![[7/ 22:00 JST Release] Indian Green Phantom Quartz (Multiple Purchase Discount Available)](http://store.karatz.jp/cdn/shop/files/collage_c7b9ee75-56b2-4af7-baca-447dbced5e6a.png?v=1783296264&width=3000)
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.