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0.1ct - 2.0ct

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Sold out マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.189ctルース

Bekiri Blue Garnet (Color Change Garnet) from Madagascar 3.5mm/0.189ct Loose Stone
Sold out カナダ産ナトロライト 0.982ctルース

Canadian Natrolite 7.1mm/0.982ct Loose Stone by Nikkei
Sold out カナダ産ナトロライト 0.921ctルース

Canadian Natrolite 0.921ct Loose Stone, Japan-Germany Mirror
Sold out マダガスカル産パープルサファイア 0.562ctルース JTL鑑

Madagascar Purple Sapphire 0.562ct Loose JTL Catalog
Sold out マダガスカル産グリーンサファイア 0.338ctルース JTL鑑

Madagascar Green Sapphire 0.338ct Loose JTL
Sold out ブラジル産アレキサンドライト 2.8mm/0.100ctルース

Brazilian Alexandrite 2.8mm/0.100ct Loose Stone
Sold out スリランカ産スターサファイア 0.899ctルース

Sri Lankan Star Sapphire 0.899ct Loose

Sold out ルビー 0.302ctルース

Ruby 0.302ct loose stone
Sold out モザンビーク産アルマンディンガーネット 1.359ctルース

Mozambique Almandine Garnet 1.359ct Loose Stone
coming soon [Lottery Sale 0731_10] Colombian Non-Oil Emerald 0.370ct Loose Stone GIA

[Lottery Sale 0731_10] Colombian Non-Oil Emerald 0.370ct Loose Stone GIA Sale price¥298,000
coming soon [Lottery Sale 0731_09] Burmese Ruby 1.020ct Loose Stone GIA

[Lottery Sale 0731_09] Burmese Ruby 1.020ct Loose Stone GIA Sale price¥188,000
coming soon [Listed as 12563838] Loose Golden Beryl from Brazil, 1.369ct

[Listed as 12563838] Loose Golden Beryl from Brazil, 1.369ct Sale price¥7,980
coming soon 【12563834掲載】コロンビア産トラピッチェエメラルド 1.591ctルース

[Lottery Sale 0731_05] Colombian Trapiche Emerald 1.591ct Loose Gemstone with Japanese and German Gemological Certificates Sale price¥198,000
Sold out マダガスカル産バイカラーサファイア 0.506ctルース

Madagascar Bicolor Sapphire 0.506ct Loose
Sold out ジンバブエ産ユークレース 0.101ctルース

【12563376 listed】Euclase from Zimbabwe 0.101ct Loose
Sold out ブラジル産アレキサンドライト 0.220ctルース

[Listed as 12563398] Brazilian Alexandrite 0.220ct Loose Stone
Sold out ビルマ産ピジョンブラッドルビー 0.300ctルース

[12563504 Listed] Unheated Pigeon Blood Ruby from Burma 0.300ct Loose
Sold out スリランカ産パープルサファイア 0.634ctルース

【掲載番号12563727】スリランカ産パープルサファイア 0.634ctルース
Sold out 高知県産血赤珊瑚 1.524ctルース

[Sale starts July 16th at 10 PM] Kochi Prefecture produced blood red coral loose stone, 1.524ct
Sold out ブラジル産デュモルチェライトインクォーツ 0.957ctルース

[On sale July 16th at 10 PM] Brazilian Dumortierite in Quartz 0.957ct Loose Gemstone
Sold out オーストラリア産レインボーラティスサンストーン 0.294ctルース

[On sale July 17th, 10 PM JST] Australian Rainbow Lattice Sunstone Loose Gemstone, 0.294 ct
Sold out 南アフリカ産スギライト 0.806ctルース

[On Sale July 18th at 10 PM] South African Sugilite 0.806ct Loose Gemstone
Sold out ルビー 0.226ctルース

【Sale starts July 20 at 10 PM JST】Loose Mozambique Ruby, 0.226 ct
Sold out アメリカ産オレゴンサンストーン 1.441ctルース

[On sale July 20th, 10 PM JST] USA Oregon Sunstone 7.0mm/1.441ct Loose Gemstone
Sold out オーストラリア産レインボーラティスサンストーン 1.170ctルース

[On sale 7/18 10 PM JST] Australian Rainbow Lattice Sunstone 1.170ct Loose Stone
Sold out マダガスカル産アパタイト 0.564ctルース

Madagascar Apatite 0.564ct Loose Stone [Sales start July 19, 10 PM JST]
Sold out タンザニア産コーネルピン 0.196ctルース

[On sale July 19th at 10 PM] Tanzanian Kornerupine 0.196ct Loose Stone
Sold out グリーンゾイサイト 0.375ctルース

Tanzanian Green Zoisite 0.375ct Loose Stone

Sold out [On sale 7/31 at 10 PM] Zambian Emerald 1.267ct Loose Stone with Appraisal

[On sale 7/31 at 10 PM] Zambian Emerald 1.267ct Loose Stone with Appraisal

KARATZ Custom Made

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.

KARATZ・Five Commitments

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.