Custom Cut
【9/11 22時販売】タンザニア産アルマンディンガーネット 1.354ctルース
Sale price¥15,800
Spanish bicolor sphalerite 3.504ct loose stone
Sale price¥35,800
1.953ct Bicolor Sphalerite from Spain
Sale price¥18,800
Nigerian Aventurine Aquamarine 0.471ct Loose Stone
Sale price¥6,980
Brazilian Sky Blue Topaz (untreated) 1.376ct loose stone
Sale price¥9,800
Brazilian Goshenite 0.771ct loose stone
Sale price¥6,980
【9/4 22時販売】ブラジル産カラーシフトアメジスト 2.649ctルース
Sale price¥9,800
【9/4 22時販売】ルビー 0.411ctルース
Sale price¥18,800
【9/4 22時販売】ルビー 0.200ctルース
Sale price¥12,800
【9/4 22時販売】ルビー 0.141ctルース
Sale price¥9,800
【9/6 22時販売】スリランカ・ウバ産ムーンストーン 1.155ctルース
Sale price¥18,800
【9/6 22時販売】スリランカ・ウバ産ムーンストーン 1.418ctルース
Sale price¥22,800
【9/10 22時販売】スリランカ産ムーンストーン 0.837ctルース
Sale price¥12,800
【9/10 22時販売】スリランカ産ムーンストーン 0.858ctルース
Sale price¥14,800
【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
【9/6 22時販売】インド産アイオライトサンストーン 0.509ctルース
Sale price¥7,980
【9/7 22時販売】インド産パロットクリソベリル 0.288ctルース
Sale price¥12,800
Brazilian copper rutilated quartz 1.334ct loose stone
Sale price¥8,800
Oregon Sunstone from the United States 0.292ct loose stone
Sale price¥6,980
Oregon Sunstone from the United States 1.132ct loose stone
Sale price¥12,800
South African Rhodochrosite 0.990ct Loose Stone by Nikkei
Sale price¥128,000
Tanzania Bicolor Zoisite 0.278ct Loose Stone
Sale price¥4,980
Tanzania Bicolor Zoisite 0.357ct Loose Stone
Sale price¥6,980
【8/29 22時販売】ブラジル産ラベンダークォーツ（スコロライト） 0.475ctルース
Sale price¥7,980
Brazilian copper rutilated quartz 1.262ct loose stone
Sale price¥6,980
Brazilian copper rutilated quartz 1.647ct loose stone
Sale price¥6,980
Synthetic Alexandrite 0.578ct loose stone
Sale price¥9,800
Brazilian Euclase 0.213ct loose stone (bicolor Euclase)
Sale price¥12,800
【9/1 22時販売】アフガニスタン産ミントカラートルマリン 0.290ctルース
Sale price¥14,800
【9/3 22時販売】YAG（イットリウムアルミニウムガーネット） 5.7mm/0.992ctルース
Sale price¥12,800
【9/3 22時販売】ブラジル産ロードナイトインクォーツ 0.438ctルース
Sale price¥8,800
[Featured in 12563725] Sri Lankan Pink Sapphire 0.319ct Loose
Sale price¥29,800
【Sale starts 8/25 10 PM JST】Synthetic Rutile 0.344ct Loose Gemstone
Sale price¥8,800
[On sale August 25th, 10 PM] Ruby 0.168ct Loose Stone
Sale price¥11,800
[On sale August 25th at 10 PM] Ruby loose stone, 0.268ct
Sale price¥15,800
[Sale on August 27th at 10 PM] Synthetic Rutile 0.566ct Loose Stone
Sale price¥9,800
Brazilian Euclase (Bicolor Euclase) 0.302ct Loose Stone
Sale price¥45,800
[12552852] Citrine 2.734ct loose stone
Sale price¥22,800
[Lottery Sale 0628_08] Unheated Kashmir Sapphire 0.160ct Loose GIA
Sale price¥98,000
[Item 12564022] Tanzanian Mint Diopside 0.794ct Loose Stone
Sale price¥22,800
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.