Ruth

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[Kikyo Cut] Citrine 7.620ct Loose《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

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[Kikyo Cut] Green Quartz 6.550ct Loose《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

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【桔梗カット】ロッククリスタル 19.590ctルース《シミズ貴石代表・清水幸雄氏》ワッペン付

[Kikyo Cut] Rock Crystal 19.590ct Loose (Mr. Yukio Shimizu, Representative of Shimizu Precious Stones) Patch Included

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【桔梗カット】ロッククリスタル 15.750ctルース《シミズ貴石代表・清水幸雄氏》ワッペン付

[Kikyo Cut] Rock Crystal 15.750ct Loose《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

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[Koshu Precious Stone Kiriko] Bicolor Amethyst 14.320ct Loose with Patch

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[Koshu Precious Stone Kiriko] Blue Topaz 27.540ct Loose with Patch

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【甲州貴石切子】イエロースキャポライト（UVタイプ） 4.880ctルースワッペン付

[Koshu Precious Stone Kiriko] Yellow Scapolite (UV type) 4.880ct loose with patch

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[Koshu Precious Stone Kiriko] Purple Scapolite 5.450ct Loose with Patch

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【甲州貴石切子】アンデシン・ラブラドライト（通称名ブルームーンストーン） 1.970ctルースワッペン付

[Koshu Precious Stone Kiriko] Andesine Labradorite (commonly known as Blue Moonstone) 1.970ct loose with emblem

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Paracytic peridot 0.181ct loose

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[Fukasawa Agate Mushroom] Agate (agate) 24.906ct loose with patch

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[Fukasawa Agate Mushroom] Agate (agate) 28.751ct loose with patch

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ブラジル産パライバトルマリン 0.125ctルース（CuO:2.5%、MnO:3.0%）

Paraiba tourmaline from Brazil 0.125ct loose (CuO:2.5%, MnO:3.0%)

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ブラジル産パライバトルマリン 0.051ctルース（CuO:2.0%、MnO:2.0%）

Paraiba tourmaline from Brazil 0.051ct loose (CuO:2.0%, MnO:2.0%)

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Paraiba tourmaline from Brazil 0.048ct loose (CuO:1.7%, MnO:1.7%)

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ブラジル産パライバトルマリン 0.042ctルース（CuO:2.5%、MnO:2.4%）

Brazilian Paraiba tourmaline 0.042ct loose (CuO:2.5%, MnO:2.4%)

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ブラジル産パライバトルマリン 0.033ctルース（CuO:2.7%、MnO:2.4%）

Paraiba tourmaline from Brazil 0.033ct loose (CuO:2.7%, MnO:2.4%)

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ブラジル産パライバトルマリン 0.030ctルース（CuO:2.7%、MnO:2.8%）

Brazilian Paraiba tourmaline 0.030ct loose (CuO:2.7%, MnO:2.8%)

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ブラジル産パライバトルマリン 0.027ctルース（CuO:3.0%、MnO:2.4%）

Brazilian Paraiba tourmaline 0.027ct loose (CuO:3.0%, MnO:2.4%)

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Unheated Brazilian Paraiba tourmaline 0.110ct loose AIGS

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【12534194掲載】非加熱ブラジル産パライバトルマリン 0.190ctルース

Unheated Brazilian Paraiba tourmaline 0.190ct loose AIGS

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Unheated Brazilian Paraiba tourmaline 0.170ct loose AIGS

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【12534192掲載】非加熱コーンフラワーブルーサファイア 0.460ctルース

Unheated cornflower blue sapphire 0.460ct loose AIGS

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Cornflower blue sapphire 0.470ct loose AIGS

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Pigeon blood ruby 0.40ct loose AIGS

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Pigeon blood ruby 0.950ct loose AIGS

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Padparadscha sapphire 0.676ct loose medium treasure book

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Padparadscha sapphire 0.603ct loose medium treasure book

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Peach benitoite 0.132ct loose Japanese-German book (orange benitoite)

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Star garnet 11.460ct loose (6 rows)

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Thai pigeon blood ruby 0.510ct loose AIGS

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Unheated cornflower blue sapphire 0.230ct loose AIGS

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【さくらインカット】ティンカーベルクォーツ 3.670ctルース - カラッツSTORE

[Sakura Incut] Tinkerbell Quartz 3.670ct Loose (Pink Fire Quartz)

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Peristerite 0.690ct loose Japanese-German book

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【甲州貴石切子】アイオライトサンストーン 1.510ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Iolite Sunstone 1.510ct Loose

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[Koshu precious stone cut] Opal 0.760ct loose

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Diamond 0.610ct loose (F, SI1, horsehead cut)

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[Kikyo cut] Oil-in quartz 4.010ct loose [Shimizu Precious Stone Representative Yukio Shimizu] Patch included

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[Koshu Precious Stone Kiriko] Moonstone 3.400ct loose

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Yellow sphalerite 0.409ct loose

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Bicolor Sphalerite 4.230ct loose

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Oregon Sunstone 2.750ct loose (vortex cut)

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Topaz 2.380ct loose (vortex cut)

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Trapiche sapphire 6.914ct loose

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.