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Sold out ブラウンダイヤモンド 0.554ctルース(UNDER S(LIGHT YELLOWISH BROWN), SI-2)

Brown Diamond 0.554 ct Loose (Color Distribution / LIGHT YELLOWISH BROWN, SI-2)

Sold out 【12562525掲載】オーストラリア産ブラックオパール 0.956ctルース

Australian Black Opal 0.956ct Loose Stone
Sold out オーストラリア産ブラックオパール 3.871ctルース

Australian black opal, 3.871 ct, loose
Sold out 【12562382掲載】ジンカイト 1.059ctルース

Polish Zincite 1.059 ct Loose Stone, Nichidoku Appraisal

Sold out 【12562061掲載】アメリカ産ネプチュナイト 0.256ctルース

0.256ct Neptunite from the USA, with a certificate

Sold out ブラジル産メデューサクォーツ（パライバクォーツ） 1.003ctルース

Brazil Medusa Dendritic Quartz 1.003ct Loose

Sold out 【32501846掲載】ダイヤモンド 0.290ctルース(J, VS1)

0.290ct loose diamond (J, VS1, Ashoka cut)

Sold out 0.084ct loose green diamond (FANCY GRAY GREEN, I-1)

0.084ct loose green diamond (FANCY GRAY GREEN, I-1)

Sold out ピンクサファリン 0.178ctルース

0.178ct Madagascar Pink Sapphire Loose Stone, Japan-German

Sold out パキスタン産ヴィータニエミアイト 0.184ctルース

Pakistani Vitaniemiite 0.184ct loose stone

Sold out Lazulite (0.077ct) from Pakistan, loose

Lazulite (0.077ct) from Pakistan, loose
Sold out [Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.638ct Loose

[Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.638ct Loose
Sold out カラーチェンジジルコン 0.556ctルース

Burmese color-change zircon 0.556 ct loose

Sold out [Sakura InCut] Synthetic Sapphire 2.610ct Loose Stone (Synthetic Pink Sapphire)

[Sakura InCut] Synthetic Sapphire 2.610ct Loose Stone (Synthetic Pink Sapphire)

Sold out [Yukinko Cut] Synthetic Sapphire 2.102ct Loose Stone

[Yukinko Cut] Synthetic Sapphire 2.102ct Loose Stone

Sold out [Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 0.999ct Loose Stone

[Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 0.999ct Loose Stone

Sold out [Sakura Shape] Oregon Sunstone from the United States, 1.224ct Loose

[Sakura Shape] Oregon Sunstone from the United States, 1.224ct Loose
Sold out Russian Alexandrite 2.4mm/0.061ct Loose Stone

Russian Alexandrite 2.4mm/0.061ct Loose Stone
Sold out Ruby 3.3mm/0.171ct Loose

Ruby 3.3mm/0.171ct Loose
Sold out Pakistani vanadium sphene 0.759ct loose

Pakistani vanadium sphene 0.759ct loose
Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.594ct loose stone with certificate of authenticity

Brazilian unheated pink imperial topaz (sherry pink) 0.594ct loose stone with certificate of authenticity
Sold out Australian black opal 3.148ct loose

Australian black opal 3.148ct loose
Sold out コンクパール（火焔模様有り） 0.439ctルース

Conch pearl (with flame pattern) 0.439ct loose
Sold out アフガニスタン産マンガノタンタライト 0.233ctルース

Mangano tantalite from Afghanistan 0.233ct loose

Sold out 【12560350掲載】ジンバブエ産ユークレース 0.138ctルース

Zimbabwean Euclase 0.138ct Loose Stone
Sold out Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity

Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity
Sold out Tanzanian Violet Sapphire 0.920ct Loose

Tanzanian Violet Sapphire 0.920ct Loose
Sold out Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan

Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan
Sold out ダイヤモンド原石（ソーヤブル） 0.635ct原石（トライゴン有）

Rough diamond (sawable) 0.635ct rough diamond (with trigon)

Sold out レッドベリル 0.318ctルース

Red beryl 0.318ct loose

Sold out レッドベリル 0.280ctルース

Red beryl 0.280ct loose

Sold out 【さくらインカット】オレゴンサンストーン 8mm/1.570ctルース ワッペン付 - カラッツSTORE

[Sakura Incut] Oregon Sunstone 8mm/1.570ct Loose with Patch

Sold out エメラルド 3.890ctルース（バイカラーエメラルド）

Emerald 3.890ct loose (bicolor emerald)

Sold out 【さくらインカット】スピネル 0.691ctルース - カラッツSTORE

[Sakura Incut] Spinel 0.691ct loose

Sold out Pt900ブルーサファイア0.67ct リング - カラッツSTORE

[Colorful] Pt900 blue sapphire 0.67ct ring

Sold out ジンバブエ産ユークレース 0.430ctルース

Euclase from Zimbabwe 0.430ct

Sold out バイカラーサファイア 0.337ctルース

Bicolor sapphire 0.337ct loose

Sold out グリーントルマリン 1.850ctルース

Green tourmaline 1.850ct loose

Sold out イエローダイヤモンド 0.306ctルース(LIGHT YELLOW, SI1)

Yellow diamond 0.306ct loose (LIGHT YELLOW, SI1)

Sold out ダイヤモンド 0.411ctルース(F, SI2)

Diamond 0.411ct loose (F, SI2)

Sold out Conch pearl 0.239ct loose (with flame pattern)

Conch pearl 0.239ct loose (with flame pattern)

Sold out ブラジル産パライバトルマリン 0.194ctルース（CuO:1.2%、MnO:1.6%）

Brazilian Paraiba tourmaline 0.194ct loose (CuO:1.2%, MnO:1.6%)

Sold out ブラジル産パライバトルマリン 0.169ctルース

Brazilian Paraiba tourmaline 0.169ct loose (CuO:0.8%, MnO:2.1%)

Sold out 【甲州貴石切子】アンデシン 0.980ctルース

[Koshu Precious Stone Kiriko] Andesine 0.980ct loose

Sold out 【12528276掲載】デュモルチェライト 4.275ctルース

[Koshu Precious Stone Kiriko] Dumortierite 4.275ct loose

Sold out 【甲州貴石切子】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） 0.876ctルース

[Koshu Precious Stone Kiriko plusthree] Andesine Labradorite (commonly known as Rainbow Moonstone) 0.876ct 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.