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Sold out ナイジェリア産コバルトガーナイト 0.123ctルース

[On sale June 7th at 10 PM] Nigerian Cobalt Garnet 0.123ct Loose Stone with Gemstone Identification Report
Sold out ナイジェリア産コバルトガーナイト 0.095ctルース

[On sale June 7th at 10 PM] Nigerian Cobalt Hauyne Loose Stone, 0.095ct, with AGL certificate
coming soon Pt900 ブルーサファイア 1.05ct・ダイヤモンド0.05ctリング 鑑別書

[22602631 Posted] [Coloreful] Pt900 Blue Sapphire 1.05ctct Ring Sale price¥98,000
coming soon Pt900/K18 ダイヤモンド 0.22ctリング 鑑別書

[Listed 22602633] [Colorful] Pt900/K18 Diamond 0.22ct Ring Sale price¥98,000
coming soon K18 ロードクロサイト 0.77ct リング 鑑別書

[22602635 listed] [Calafuri] K18 Rhodochrosite 0.77ctct Ring Sale price¥39,800
Sold out ルベライト 0.410ctルース

Mozambique Rubellite 0.410ct Loose Stone
Sold out ロシア産ダイヤモンド原石（ソーヤブル） 0.117ctルース

Russian rough diamond (sawable) 0.117ct loose
Sold out タンザニア産ゾイサイト 0.227ctルース

[12550864] 0.227ct loose zoisite from Tanzania
Sold out Pt900/Pt850 ブラジル産アレキサンドライト 0.2ct ペンダント（ネックレス）

Pt900/Pt850 Brazilian Alexandrite 0.2ct Diamond Pendant (Necklace)
Sold out Pt900 コロンビア産エメラルド 0.72ct リング

Pt900 Colombian emerald 0.72ct, diamond 0.61ct ring
Sold out 非加熱ルビー 0.330ルース

Unheated Ruby 0.330ct Loose AIGS
Sold out Limited to 8 stones Cheetah pattern cat cut KARATZ collaboration (Amber, 8.5mm) Multiple purchase discounts available

Limited to 8 stones Cheetah pattern cat cut KARATZ collaboration (Amber, 8.5mm) Multiple purchase discounts available
Sold out Limited to 19 stones: Blue sapphire from Madagascar (medium blue, oval cut) Discounts available for multiple purchases

Limited to 19 stones: Blue sapphire from Madagascar (medium blue, oval cut) Discounts available for multiple purchases
Sold out 【さくらシェイプ】メキシコ産オパール 6.7mm/0.792ctルース（コントラルス）

[Sakura Shape] Mexican Opal 6.7mm/0.792ct {Collaboration} Loose (Contralus) Patch
Sold out 【さくらシェイプ】ブラジル産インペリアルトパーズ（シェリーカラー） 6.3mm/1.084ct《コラボ》ルース ワッペン

[Sakura Shape] Brazilian Imperial Topaz (Shelly Color) 6.3mm/1.084ct {Collaboration} Loose Patch
Sold out ミャンマー産マスグラバイト 0.090ctルース GLT鑑

Myanmar Musgravite 0.090ct Loose GLT
Sold out アンゴラ産グリーンダイヤモンド原石（ソーヤブル） 0.491ct原石（トライゴン）

Angola Green Diamond Rough (Sawable) 0.491ct Rough (Trigon)
Sold out アンゴラ産グリーンダイヤモンド原石（ソーヤブル） 0.525ct原石

Angola Green Diamond Rough (Sawable) 0.525ct Rough
Sold out 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） 10.080ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 10.080ct loose
Sold out Mozambique Pink Spinel 0.550ct Loose

Mozambique Pink Spinel 0.550ct Loose
Sold out グレースピネル（プラチナスピネル） 1.028ctルース

Tanzanian Blue Spinel 1.028ct Loose Stone
Sold out ブラジル産パライバトルマリン 0.181ctルース

Brazilian Paraiba Tourmaline 0.181ct loose stone (CuO: 0.7%, MnO: 0.2%)
Sold out ブラジル産パライバトルマリン 0.112ctルース

Paraiba tourmaline from Brazil 0.112ct loose
Sold out トラピッチェエメラルド 1.341ctルース

Colombian Trapiche Emerald 1.341ct Loose
Sold out Kurohira Quartz (Kurohira Mine, Yamanashi Prefecture) 1 rough stone 5.2 x 2.2 cm {Multiple purchase discounts available}

Kurohira Quartz (Kurohira Mine, Yamanashi Prefecture) 1 rough stone 5.2 x 2.2 cm {Multiple purchase discounts available}
Sold out スリランカ産クリソベリルキャッツアイ 0.532ctルース

Sri Lankan Chrysoberyl Cat's Eye 0.532ct Loose Stone
Sold out アメリカ産オレゴンサンストーン 2.467ctルース

Oregon Sunstone from the United States 2.467ct loose stone
Sold out モザンビーク産非加熱ルビー 0.220ctルース

Unheated Mozambique Ruby 0.220ct Loose

Sold out プレーナイト 5.398ctルース

Australian Prehnite 5.398ct 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） 0.399ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.399ct loose stone
Sold out スリランカ産イエローサファイア 0.543ctルース

Sri Lankan Yellow Sapphire 0.543ct Loose
Sold out ファイアオパール 1.755ctルース

Mexican Fire Opal 1.755ct Loose

Sold out Fluorite rough stone from Namibia 5.0 x 6.3 x 2.0cm

Fluorite rough stone from Namibia 5.0 x 6.3 x 2.0cm
Sold out Limited to 2 stones: 1 loose Mahenge spinel from Tanzania (3mm, round cut) Discounts available for multiple purchases

Limited to 2 stones: 1 loose Mahenge spinel from Tanzania (3mm, round cut) Discounts available for multiple purchases
Sold out Brazilian Green Tourmaline 1 Stone Loose {Multiple Purchase Discounts Available}

Brazilian Green Tourmaline 1 Stone Loose {Multiple Purchase Discounts Available}
Sold out 【12531645掲載】ハックマナイト 27.410ct原石

Hackmanite from Afghanistan, 27.410ct rough stone
Sold out コンクパール 0.533ctルース（ピンクホワイト）

Caribbean Conch Pearl 0.332ct Loose (Pink White)

Sold out Pt900 Russian Demantoid Garnet (Horsetail certified) 4.3mm/0.33ct, Diamond 0.48ct Ring

Pt900 Russian Demantoid Garnet (Horsetail certified) 4.3mm/0.33ct, Diamond 0.48ct Ring
Sold out Pt900 Colombian emerald 0.60ct diamond 0.19ct ring

Pt900 Colombian emerald 0.60ct diamond 0.19ct ring
Sold out 【ダンデライオンカット】ピンクトルマリン 1.260ctルース - カラッツSTORE

[Dandelion Cut] Brazilian Pink Tourmaline 7mm Loose Patch
Sold out Canary Yellow Diamond (Treatment) 0.260ct Loose (FANCY INTENSE GREENISH YELLOW*, SI-2)

Canary Yellow Diamond (Treatment) 0.260ct Loose (FANCY INTENSE GREENISH YELLOW*, SI-2)
Sold out TV anime "The Story of Going to a Mixer and Not Having a Girlfriend" x KARATZ collaboration pair image rings Suou x Tokiwa image

TV anime "The Story of Going to a Mixer and Not Having a Girlfriend" x KARATZ collaboration pair image rings Suou x Tokiwa image

Sold out Afghanite 0.333ct loose stone from Afghanistan, Japan-Germany

Afghanite 0.333ct loose stone from Afghanistan, Japan-Germany
Sold out Afghanite from Afghanistan 0.250ct loose stone

Afghanite from Afghanistan 0.250ct loose stone
Sold out Afghanite from Afghanistan 0.360ct loose stone

Afghanite from Afghanistan 0.360ct loose stone
Sold out TV anime "I went to a blind date and there were no girls" x KARATZ collaboration pair image rings Wisteria x Light Blue image

TV anime "I went to a blind date and there were no girls" x KARATZ collaboration pair image rings Wisteria x Light Blue image

Sold out TV anime "I Went to a Mixer and There Were No Girls" x KARATZ collaboration pair image rings, amber x bush clover image

TV anime "I Went to a Mixer and There Were No Girls" x KARATZ collaboration pair image rings, amber x bush clover image

Sold out Brazilian Paraiba Tourmaline 0.073ct Loose Stone (CuO: 1.8%, MnO: 2.5%)

Brazilian Paraiba Tourmaline 0.073ct Loose Stone (CuO: 1.8%, MnO: 2.5%)

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.