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Ruth

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Sold out 0.361ct loose Brazilian Paraiba Tourmaline (CuO:1.0%, MnO:3.6%)
Sold out Brazilian Paraiba tourmaline 0.128ct loose stone (CuO: 1.7%, MnO: 3.4%)
Sold out Unheated Pigeon Blood Ruby 0.710ct Loose Stone AIGS
Sold out German Auchenite 0.083ct loose stone
Sold out German Apatite 3.1mm/0.100ct Loose Stone
Sold out Indian Moonstone 5.0mm/0.474ct Loose Stone (Rose Cut)
Sold out Mexican Fire Agate 8.033ct Loose Stone
Sold out 《Limited to 13 stones》Beryl Gacha (including Aquamarine Vortex Cut Koshu Kiseki Kiriko) 1 Loose Stone《Multi-purchase discount available》
Sold out Limited to 20 stones: 1 loose sphalerite stone from Spain. Discounts available for multiple purchases.
Sold out Limited Edition of 11 Montana Sapphires (Rock Creek Mine) Gacha! 1 Loose Stone (Oval Cut, 5x3mm) - Multiple Purchase Discounts Available
Sold out Limited to 6 stones: 1 loose Brazilian pyrite in quartz (average 3.2 carats) Multiple purchase discounts available
Sold out American benitoite 0.147ct loose
Sold out American benitoite 0.127ct loose
Sold out American benitoite 0.133ct loose
Sold out American benitoite 0.187ct loose
Sold out ピンクサファイア 0.881ctルース
Sold out デマントイドガーネットキャッツアイ(ホーステール認む) 0.171ctルース
Sold out デマントイドガーネットキャッツアイ(ホーステール認む) 0.222ctルース
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) 0.167ctルース
Sold out マダガスカル産バイカラーサファイア 0.259ctルース
Sold out マダガスカル産バイカラーサファイア 0.198ctルース
Sold out マダガスカル産バイカラーサファイア 0.212ctルース
Sold out ゴーシェナイト 1.989ctルース
Sold out トルコ産ダイアスポア 0.858ctルース
Sold out Brazilian kyanite in quartz 4.770ct loose
Sold out ブラジル産トラピッチェアメジスト 24.772ctルース
Sold out トルマリンキャッツアイ 0.910ctルース
Sold out オパール 0.595ctルース
Sold out デュモルチェライトインクォーツ 3.901ctルース
Sold out ブラジル産メデューサクォーツ(パライバクォーツ) 6.954ctルース
Sold out Citrine 0.833ct loose stone
Sold out アメジスト 8.044ctルース
Sold out ダンビュライト 1.427ctルース
Sold out アクアマリンキャッツアイ 3.528ctルース
Sold out メキシコ産ファイアーアゲート 3.800ctルース
Sold out ベトナム産非加熱シルキーピンクサファイア 0.197ctルース
Sold out スターガーネット 14.600ctルース
Sold out ロシア産デマントイドガーネット(ホーステール認む) 1.058ctルース
Sold out Brazilian Alexandrite 0.244ct Ruth (Hemachita Mine)
Sold out Limited to 10 stones! Zimbabwean Bicolor Euclase, Bicolor Sapphire, and More! Bicolor Loose Stones! 💎 Single Loose Stones Available. Discounts Available for Multiple Purchases.
Sold out マダガスカル産バイカラークリソベリル 1.590ctルース
Sold out Kunzite from Afghanistan 26.784ct loose
Sold out Brazilian dumortierite in quartz 4.592ct loose
Sold out Russian Demantoid Garnet (Horsetail) 4.2mm/0.325ct Loose Stone
Sold out Brazilian Dumortierite in Quartz 1.779ct Loose Stone
Sold out [On Sale at 10 PM on December 7th] Rainbow Garnet (Andradite Garnet) 2.365ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out [On Sale at 10 PM on December 7th] Rainbow Garnet (Andradite Garnet) 5.4mm/0.771ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out Madagascar Iolite 0.644ct Loose Stone

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.