Ka row

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Conch pearl 0.239ct loose (with flame pattern)

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Conch pearl 0.319ct loose (with flame pattern)《June birthstone》

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【桔梗カット】ティンカーベルクォーツ 5.050ctルース《シミズ貴石代表・清水幸雄氏》

[Kikyo Cut] Tinker Bell Quartz 5.050ct Loose《Mr. Yukio Shimizu, Representative of Shimizu Precious Stones》 Patch included

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White conch pearl 0.704ct loose

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Russian demantoid garnet (horsetail recognized) 0.235ct loose

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

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[Konpeito] Chrysoprase 2.460ct loose

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【甲州貴石切子】フローライトインクォーツ 4.550ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Fluorite in Quartz 4.550ct Loose

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[Koshu Precious Stone Kiriko] Lemon Quartz 3.890ct Loose

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【甲州貴石切子】レピドクロサイトインクォーツ 1.590ctルース - カラッツSTORE

[Koshu Precious Stone Kiriko] Lepidocrocite in Quartz 1.590ct Loose

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[Konpeito] Milky quartz 3.260ct loose

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K18アンドラダイトガーネット（通称名レインボーガーネット）0.347ct リング - カラッツSTORE

K18 andradite garnet (commonly known as rainbow garnet) 0.347ct ring

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Cantera Opal 3.750ct Loose (Egged in)

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[Koshu Precious Stone Kiriko] Rhodolite Garnet 3.77ct Loose

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Dumortierite in quartz 4.994ct loose

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[Konpeito] Sea blue chalcedony 2.606ct loose

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【12522995掲載】ロシア産デマントイドガーネット（ホーステール認む） 0.610ctルース

Russian demantoid garnet (horsetail recognized) 0.610ct loose

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[Dandelion cut] Almandine garnet 1.60ct loose

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[Koshu Precious Stone Kiriko] Dumortierite in Quartz

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【poooohpigu様専用】カルセドニー 2.768ctルース - KARATZ STORE｜カラッツSTORE

[Konpeito] Chalcedony 2.768ct loose

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[Konpeito] Sea blue chalcedony 2.607ct loose

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K18レモンクォーツ16.465ct・ダイヤモンドペンダント（甲州貴石切子） - KARATZ STORE｜カラッツSTORE

[Koshu Precious Stone Kiriko] K18 Lemon Quartz 16.465ct Pendant Japanese-German Appraisal

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K18PGロードライトガーネット1.48ct ペンダント（ダンデライオンカット） - KARATZ STORE｜カラッツSTORE

[Dandelion Cut] K18PG Rhodolite Garnet 1.48ct Pendant

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K18ラベンダークォーツ（スコロライト）4.00ct ペンダントトップ - KARATZ STORE｜カラッツSTORE

K18 Lavender Quartz (Scololite) 4.00ct Pendant Top

Brazilian copper rutilated quartz 1.334ct loose stone Sale price¥8,800

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Brazilian Flower Rutile in Quartz 3.312ct Loose Stone

coming soon

【Sales start: August 11, 10 PM JST】《Limited 14 stones》Rare Stone Gacha featuring Leucogarnet, Cinnabar, Gahnite, and more!《Bulk Purchase Discount Available》 Sale price¥7,980

coming soon

【9/4(金)AM10時〆：抽選販売_12】K18YG タンザニア産アルマンディンガーネット 1.003ct・ピンクサファイアリング Sale price¥98,000

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【9/5(土)AM10時〆：抽選販売_04】ロシア産デマントイドガーネット（ホーステール認む） 6.3mm/1.170ctルース GIA Sale price¥558,000

【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

【9/3 22時販売】ブラジル産ロードナイトインクォーツ 5.5mm/0.562ctルース Sale price¥8,800

【9/3 22時販売】ブラジル産ロードナイトインクォーツ 6.2mm/0.600ctルース Sale price¥9,800

coming soon

[Lottery Sale 0829] Pt900 Conch Pearl 0.56ct Diamond 0.25ct Ring with Appraisal Certificate Sale price¥148,000

coming soon

【12564221掲載】ザンビア産カナリーイエロートルマリン 5.264ctルース

[12564221 Listed] Canary Yellow Tourmaline from Zambia, 5.264ct Loose Gemstone Sale price¥158,000

coming soon

【12564185 Published】Sri Lankan Unheated Color Change Sapphire 1.170 ct Loose Stone Sale price¥298,000

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Brazilian copper rutilated quartz 2.101ct loose stone

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Brazilian copper rutilated quartz 1.465ct loose stone

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2.863ct Loose Nepali Kyanite (Royal Blue Color)

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Synthetic Alexandrite 5.1mm/0.663ct Loose Stone

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Synthetic Alexandrite 1.320 ct 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.