New stock

Tanzanian Mint Garnet 1.276ct Loose Stone Sale price¥69,800

Indian Cavansite 1.171ct loose stone Sale price¥9,800

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Montana Sapphire 0.405ct Loose (Green Sapphire)

Montana Sapphire 0.331ct Loose (Bi-Color Sapphire) Sale price¥8,800

Mozambique Pink Tourmaline 1.122ct Loose Stone (Contains CuO) Sale price¥39,800

Zimbabwean Blue Apatite (UV Type) 1.019ct Loose Sale price¥14,800

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Brazilian Paraiba Tourmaline 0.759ct rough stone

Russian diamond rough (sawable) 0.094ct rough Sale price¥24,800

Bicolor Euclase from Zimbabwe 0.033ct loose Sale price¥28,800

Pakistani Lazurite (Azurite) 0.305ct Loose Stone Sale price¥49,800

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Pakistani Lazurite (Azurite) 0.375ct loose stone

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【12551483掲載】ベトナム産非加熱シルキーピンクサファイア 0.433ctルース

Unheated silky pink sapphire from Vietnam 0.433ct loose

Cassiterite 1.658ct loose stone (bicolor cassiterite) Japan-Germany exchange Sale price¥128,000

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【12551828掲載】コロンビア産パイライト・雲母インエメラルド 3.208ctルース

Colombian pyrite-mica emerald 3.208ct loose stone

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【さくらインカット】ブラジル産ライモナイトインクォーツ（オーロラクォーツ） 11.3mm/3.760ct《コラボ》ルース　ワッペン

[Sakura Incut] Brazilian Limonite in Quartz (Aurora Quartz) 11.3mm/3.760ct {Collaboration} Loose Patch

Bicolor Fluorite 6.1mm/0.869ct Loose Stone Sale price¥6,980

Manganotantalite 0.736ct loose stone from Japan and Germany Sale price¥158,000

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Colombian Mica in Emerald 4.6mm/0.210ct Loose Stone

非加熱ブラジル産パライバトルマリン 0.037ctルース（CuO:1.9%、MnO:2.3%）

Brazilian Paraiba Tourmaline 0.037ct Loose (CuO:1.9%, MnO:2.3%) Sale price¥39,800

Ethiopian Opal 5.2mm/0.688ct Loose (Sphere) Sale price¥6,980

非加熱ブラジル産パライバトルマリン 0.067ctルース（CuO:1.4%、MnO:2.4%）

Paraiba Tourmaline from Brazil 0.067 ct loose (CuO: 1.4%, MnO: 2.4%) Sale price¥45,800

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Limited to 7 stones: 1 loose Sri Lankan spinel (lozenge cut) stone. Discounts available for multiple purchases.

Limited to 8 stones: 1 Brazilian Alexandrite loose stone (rose cut, 3.2mm/average 0.12ct) Multiple purchase discounts available Sale price¥11,000

Limited to 9 stones: 1 Brazilian Alexandrite loose stone (rose cut, 3mm/average 0.105ct) Multiple purchase discounts available Sale price¥9,800

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Limited to 4 stones: 1 Brazilian Alexandrite loose stone (rose cut, 3.3mm/average 0.13ct) Multiple purchase discounts available

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[Ametalk! Appearance Celebration | 4 Days Only | July 2 (Thu) 10 PM JST~] Adult Sebonstar Adjuster Charm

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Pt950 Diamond (Cabochon Cut) 0.131ct Ring

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[Ame Talk! Appearance Commemoration | 4-Day Limited Sale | From 10 PM on July 2 (Thursday)] Adult Sebonstar Vol. 1 Ring Precious Model (Pt950, K18YG, K18PG)

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[In commemoration of its appearance on Ame Talk! | 4-Day Limited Time | Starting July 2nd (Thu) 10 PM] Adult Cest bon Star Collection Vol. 1 Ring Silver Model (SV925)

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[Ametalk! Appearance Commemoration | 4 Days Only | July 2 (Thu) 10:00 PM~] Adult Cbonstar Vol. 1 Pendant Precious Model (Pt950, K18YG, K18PG)

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[Featured on Ame Talk! | 4-Day Special | 7/2 (Thu) 10:00 PM JST~] Adult Sebonstar Vol. 1 Pendant Silver Model (SV925)

K18PGブラジル産パライバトルマリン0.286ct・グランディディエライトリング GIA

K18PG Brazilian Paraiba Tourmaline 0.286ct Grandidierite Ring GIA Sale price¥198,000

Pt950南洋真珠9.586ct・アレキサンドライト・コーネルピン・ダイヤモンドリング

Pt950 South Sea pearl 9.586ct, alexandrite, kornerupine, diamond ring Sale price¥198,000

K18YG南洋真珠10.616ct・ベキリーブルーガーネット・アレキサンドライト・ダイヤモンドリング

K18YG South Sea pearl 10.616ct, Bekiri blue garnet, alexandrite and diamond ring Sale price¥198,000

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Pt950 Burmese Ruby 0.21ct Ruby Ring

非加熱ブラジル産パライバトルマリン 0.034ctルース（CuO:1.8%、MnO:2.4%）

Paraiba Tourmaline from Brazil, 0.034ct Loose (CuO: 1.8%, MnO: 2.4%) Sale price¥29,800

【12552125掲載】デトロイトシティ産ロードクロサイト 0.439ctルース

Detroit City Rhodochrosite 4mm/0.439ct Loose Stone Sale price¥8,800

Unheated Brazilian Paraiba Tourmaline 0.071ct loose stone (CuO: 2.1%, MnO: 2.2%) Sale price¥45,800

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【さくらシェイプ】YAG（イットリウムアルミニウムガーネット） 7.0mm/1.985ct《コラボ》ルースワッペン

[Sakura Shape] YAG (Yttrium Aluminum Garnet) 7.0mm/1.985ct {Collaboration} Loose Patch

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【さくらシェイプ】カンボジア産ブルージルコン 8mm/2.909ct《コラボ》ルースワッペン

[Sakura Shape] Cambodian Blue Zircon 8mm/2.909ct {Collaboration} Loose Patch

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[Sakura Shape] Tanzanite from Tanzania 6mm/0.889ct {Collaboration} Loose Patch

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[Sakura Shape] Brazilian White Topaz 8.5mm/2.870ct {Collaboration} Loose Patch

Mexican Cantera Opal 4.835ct Loose Sale price¥19,800

Limited to 7 stones: 1 loose stone of spinel (blue/purple) from Madagascar. Discounts available for multiple purchases. Sale price¥3,980

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Sri Lankan Yellow Sapphire 0.555ct Loose

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【12549199掲載】奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.543ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 0.543ct loose

【12549333掲載】ブラジル産メデューサクォーツ（パライバクォーツ） 1.945ctルース

Brazilian Medusa Quartz (Paraiba Quartz) 1.945ct Loose Stone Sale price¥24,800

American Herkimer Diamond 5.6mm/0.516ct Loose Sale price¥9,800

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.