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Sold out メキシコ産オパール 0.461ctルース

Mexican Opal 0.461ct Loose
Sold out Pt950ブラジル産アレキサンドライト0.301ct・ダイヤモンドリング

Pt950 Brazilian Alexandrite 0.301ct Diamond Ring
Sold out Pt950 スリランカ産コバルトスピネル 0.697ct リング

Pt950 Sri Lankan cobalt spinel 0.697ct ring by Nikkei
Sold out 【12527668掲載】スターガーネット 11.280ctルース

Indian Star Garnet 11.280ct Loose Stone (6 Rows)
Sold out ミントグリーンダイヤモンド（トリートメント） 0.172ctルース（VSクラス相当,テーパードカット）

Mint green diamond (treatment) 0.172ct loose (VS class equivalent, tapered cut)
Sold out パラサイティックペリドット 0.034ルース

Parasitic Peridot 2.0mm/0.034 Loose
Sold out イエローサファイア 0.302ctルース

Sri Lankan Yellow Sapphire 0.302ct Loose
Sold out エチオピア産サンストーン 0.590ctルース

Ethiopian Sunstone 0.590ct Loose
Sold out アフガニスタン産シーフォームトルマリン 0.426ctルース

Afghanistan Seafoam Tourmaline 0.426ct Loose Stone
Sold out K18YG アメリカ産オレゴンサンストーンハーフエタニティリング （V字タイプ）

K18YG Oregon Sunstone Half Eternity Ring (V-shaped)
Sold out ブラッドショットアイオライトサンストーン 7.630ctルース

Indian Bloodshot Iolite Sunstone 7.630ct Loose
Sold out オーストラリア産オパール 0.658ctルース

Australian Opal 0.658ct Loose
Sold out オーストラリア産オパール 0.678ctルース

Australian Opal 0.678ct Loose
Sold out スリランカ産ブルーサファイア 0.245ctルース

Sri Lankan Blue Sapphire 0.245ct Loose
Sold out ブルーサファイア 0.699ctルース

Blue sapphire 0.699ct loose stone
Sold out アンデシン・ラブラドライト（通称名 レインボームーンストーン） 1.220ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 1.220ct loose stone
Sold out ブラジル産パライバトルマリン 0.225ct原石（ CuO:2.1%、MnO:0.9%）

Brazilian Paraiba tourmaline 0.225ct raw stone (CuO:2.1%, MnO:0.9%)
Sold out スタースピネル 0.936ctルース

Myanmar Star Spinel 0.936ct Loose
Sold out 非加熱ブルーサファイア 1.450ctルース

Unheated Color Change Blue Sapphire 1.450ct Loose GIT
coming soon Indigolite Tourmaline 0.649ct Loose Stone

Indigolite Tourmaline 0.649ct Loose Stone Sale price¥39,800
coming soon [12559942] Tourmaline 0.486ct loose stone

[12559942] Tourmaline 0.486ct loose stone Sale price¥29,800
coming soon Indigolite Tourmaline 0.634ct Loose Stone

Indigolite Tourmaline 0.634ct Loose Stone Sale price¥39,800
coming soon Tanzanian Zoisite 0.684ct Loose Stone

Tanzanian Zoisite 0.684ct Loose Stone Sale price¥19,800
coming soon [12559941] Tourmaline 0.314ct loose stone

[12559941] Tourmaline 0.314ct loose stone Sale price¥22,800
coming soon Nigerian Cobalt Garnite 0.152ct Loose Stone

Nigerian Cobalt Garnite 0.152ct Loose Stone Sale price¥45,800
coming soon Nigerian Cobalt Garnite 0.171ct Loose Stone

Nigerian Cobalt Garnite 0.171ct Loose Stone Sale price¥49,800
coming soon Unheated ruby ​​0.430ct loose

Unheated ruby ​​0.430ct loose Sale price¥98,000
coming soon [12559637] Colombian emerald 0.176ct loose stone

[12559637] Colombian emerald 0.176ct loose stone Sale price¥59,800
coming soon [12559636] Colombian emerald 0.126ct loose stone

[12559636] Colombian emerald 0.126ct loose stone Sale price¥49,800

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.