![[Koshu Precious Stones Plusthree] Smoky Quartz 0.657ct Loose Patch](http://store.karatz.jp/cdn/shop/files/P1185356.jpg?v=1752322391&width=4000)
![[On sale May 10th at 10 PM] "Limited to 3 stones" Brazilian Paraiba Tourmaline (Cabochon Cut approx. 3.0mm) 1 Stone Loose Gemstone "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/P5070786_ec0bd736-18d0-4597-8cdf-d783daa25e3b.jpg?v=1778246718&width=3109)
![[Lottery Sale 0531_04] Unheated Kashmir Sapphire 2.6mm/0.100ct Loose Stone GIA](http://store.karatz.jp/cdn/shop/files/P5291789_76f1930a-9bae-48c5-9e02-bcb6d54e31ba.jpg?v=1784898880&width=2889)
[Listed as 12563481] Loose 0.748ct Teal Blue Sapphire from Madagascar
Sale price¥29,800
[Item 12563498] Unheated Kashmir Sapphire 0.350 ct Loose Gemstone
Sale price¥148,000
![[22602665 Listed] Pt900/Pt850 Blue Zircon (Ratanakiri Blue) 2.45ct Pendant (Necklace)](http://store.karatz.jp/cdn/shop/files/P6309097.jpg?v=1782887466&width=4000)
![[Listed as 22602664] Pt900 Blue Zircon (Ratanakiri Blue) 2.22ct Ring](http://store.karatz.jp/cdn/shop/files/P6309242.jpg?v=1782885725&width=4000)
[Listed as 22602664] Pt900 Blue Zircon (Ratanakiri Blue) 2.22ct Ring
Sale price¥158,000
Congo Pink Tourmaline 0.819ct Loose Stone
Sale price¥45,800
![[Featured in 12563503] Pigeon Blood Ruby from Burma 0.450ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P7071986_5de0b563-277a-438c-82f1-0b3b5b830620.jpg?v=1784898992&width=3142)
[Featured in 12563503] Pigeon Blood Ruby from Burma 0.450ct Loose Stone
Sale price¥98,000
![[Listed as 12563502] Mozambique Unheated Pigeon Blood Ruby 0.430ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P7072020_511151ff-27de-4b3f-ad0c-326343a51c09.jpg?v=1784898967&width=2801)
![[Next Lottery Sale] 0.427 ct Tanzanian Purple Spinel Loose Stone with Certificate](http://store.karatz.jp/cdn/shop/files/P7072347_7f603213-4327-441e-8314-a984c9e81c20.jpg?v=1783944736&width=2800)
【7/28 22時販売】アメリカ産オレゴンサンストーン 6.7mm/1.032ctルース
Sale price¥18,800
【7/28 22時販売】カンボジア産ブルージルコン（ラタナキリブルー） 1.360ctルース 鑑別書
Sale price¥18,800
【抽選販売0725_01】インド・オリッサ産アレキサンドライト 0.238ctルー 日独鑑
Sale price¥19,800
【抽選販売0725_02】インド・オリッサ産アレキサンドライト 0.278ctルース 日独鑑
Sale price¥28,800
【7/28 22時販売】マダガスカル産パパラチアサファイア 4.0mm/0.305ctルース 中宝鑑
Sale price¥67,800
【抽選販売0725_12】マダガスカル産非加熱ロイヤルブルーサファイア 1.030ctルース AIGS
Sale price¥198,000
【7/28 22時販売】コロンビア産エメラルド 4.5mm/0.286ctルース 宝貴協
Sale price¥69,800
【抽選販売0725_04】ブラジル産バイカラートルマリン 3.473ctルース 鑑別書
Sale price¥29,800
【7/28 22時販売】高知県産血赤珊瑚 1.286ctルース
Sale price¥9,800
【7/29 22時販売】コロンビア産エメラルドキャッツアイ 0.060ctルース 宝貴協
Sale price¥15,800
【7/28 22時販売】高知県産血赤珊瑚 1.379ctルース
Sale price¥11,800
【7/28 22時販売】高知県産血赤珊瑚 1.238ctルース
Sale price¥9,800
【7/28 22時販売】コロンビア・コスケス産トラピッチェエメラルド 0.184ctルース 鑑別書
Sale price¥25,800
【7/28 22時販売】コロンビア・コスケス産トラピッチェエメラルド 0.157ctルース 鑑別書
Sale price¥22,800
【7/29 22時販売】【カラフリ】Pt900 ルビー 0.69ct・ダイヤモンド0.16ctリング 鑑別書
Sale price¥188,000
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.