Over ¥100,000

[Lottery Sale 0521_08] Madagascar Sapphire 1.650ct Loose GIA Sale price¥158,000

Cambodian Blue Zircon (Ratanakiri Blue) 23.105ct Loose Gemstone with Certificate Sale price¥498,000

Natural Emerald from Brazil, 15.219 ct, Loose Stone, Nichidoku Identification Report Sale price¥398,000

Ainsel "Semi-custom ring setting" Sale price¥178,000

[Listed as 12563271] Rough Diamond (Sawable) from South Africa, 0.353 ct Sale price¥128,000

[Lottery Sale 0812_17] Unheated Burmese Jedi Spinel 0.430ct Loose Gemstone GUILD Sale price¥118,000

[Lottery Sale 1_202608_04] Pt900 Benitoite (USA) 0.152ct / Diamond 0.58ct Ring Sale price¥188,000

インターナリーフローレスダイヤモンド 0.300ctルース(D, IF) GIA

[Lottery Sale ①_202608_12] Internally Flawless Diamond 0.300 ct Loose (D, IF) GIA Sale price¥118,000

K18WG パライバトルマリン 0.09ct・ダイヤモンド0.06ctリング（CuO:1.0%、MnO:0.4%）ソーティング（一般社団法人宝石貴金属協会）

[22602666 listed] [Colorful] K18WG Paraiba Tourmaline 0.09ct Ring Sale price¥198,000

[Published 22602698] [Karafuri] K18 Ruby 6.74ct Ring Diamond 0.91ct with identification report Sale price¥228,000

【Lottery Sale ①_202608_05】K18WG Diamond 0.50ct Half Eternity Ring Sale price¥128,000

オレンジダイヤモンド 0.348ctルース(FANCY VIVID YELLOW ORANGE, VS-1)

[Featured in 32501971] Orange Diamond 0.348ct Loose Stone (FANCY VIVID YELLOW ORANGE, VS-1) Sale price¥128,000

[#202607 Akihabara Pop-up Store - Currently Displayed] [12563067 Listed] Padparadscha Sapphire 0.649ct Loose Stone Sale price¥128,000

[Lottery Sale 0707_06] Kunzite from Afghanistan, 69.722ct Loose Stone Sale price¥258,000

【Lottery Sale 0731_08】Brazilian Emerald Cat's Eye 6.083ct Loose Gemstone with Japanese and German Gemological Report Sale price¥258,000

[Lottery Sale 0731_09] Burmese Ruby 1.020ct Loose Stone GIA Sale price¥188,000

【Lottery Sale 0428_2_05】American Neptunite 0.859ct Loose Gemstone with Certificate Sale price¥128,000

Pt900 カンボジア産ラタナキリブルージルコン 2.22ct・ダイヤモンド0.38ctリング中宝ソ

[Lottery Sale 0725_14] Pt900 Cambodian Blue Zircon (Ratanakiri Blue) 2.22ct Ring with GIA Report Sale price¥158,000

【#202607 Akihabara Pop-up Store - Currently Removed for Display】[Colorfuri] Pt900 Black Opal 0.83ct / Diamond 0.62ct Ring with Certificate Sale price¥198,000

【#202607 Akihabara Pop-up Store - Currently at Offsite Location】【Shinjuku Marui Annex 202605 Offsite Location】Lottery Sale 11【For Winners Only】【Published on 12559975】Colombian Non-Oil Emerald 1.760ct Loose GIA Sale price¥1,580,000

Pt900 ビルマ産ルビー 1.07ct・ダイヤモンド0.32ctリング GIA

[22602674 Listed] [Karafuri] Pt900 Burma Ruby 1.07ct Ring Sale price¥258,000

[On Sale August 6, 10 PM] [Colori] K18 Blue Sapphire 1.13ct / Diamond 0.75ct Ring with Appraisal Report Sale price¥188,000

[Listed as 12562727] Pink Imperial Topaz 1.907ct Loose Stone Sale price¥118,000

[Posted as 12562691] Malawi Bicolor Zircon 2.082ct Loose Sale price¥128,000

Pt900 インペリアルトパーズ 3.88ct・ダイヤモンド0.26ct リング鑑別書

【Karahuri】Pt900 Imperial Topaz 3.88ct / Diamond 0.26ct Ring with Certificate Sale price¥258,000

[Karafuru] Pt900 Ruby 0.69ct, Diamond 0.16ct Ring with Appraisal Report Sale price¥188,000

Pt900 ブラックダイヤモンド 1.00ct・ダイヤモンド0.50ctリング鑑別書

[Lottery Sale 12][For Winners Only][Posted on 22602618] Pt900 Black Diamond 1.00ct / Diamond 0.50ct Ring Sale price¥158,000

Pt950/K18 パライバトルマリン 0.11ct（CuO:2.7%,MnO:3.4%）・ダイヤモンド1.12ctリング　宝貴協

[On sale August 2 at 10 PM] [ColorFuli] Pt950/K18 Paraiba Tourmaline 0.11ct (CuO:2.7%, MnO:3.4%) and Diamond 1.12ct Ring - Houki-kyo Sale price¥188,000

[12558084 posted] Benitoite 0.190ct Loose, with identification report, Made in America Benitoite 0.158ct Loose, with identification report Benitoite 0.190ct Loose, with identification report Sale price¥118,000

Pt900 ブルーサファイア 2.67ct・ダイヤモンド0.75ctペンダントトップ（ネックレストップ）鑑別書

[Item 22602648] [Colorflee] Pt900 Blue Sapphire 2.67ct Pendant Top (Necklace Top) Sale price¥228,000

[Lottery Sale_0612_09] Yellow Sapphire 2.150ct Loose Gemstone GIT Sale price¥158,000

[Lottery Sale 0428_2_07] Watermelon Tourmaline 14.780ct Loose Stone Sale price¥128,000

Pt900 ダイヤモンド原石 2.733ct・ダイヤモンド0.68ctリング鑑別書

[Calafuri] Pt900 Rough Diamond 2.733ct, Diamond 0.68ct Ring with Certificate Sale price¥198,000

Pomme Blanche "Semi-custom ring setting" Sale priceFrom ¥105,800

K18WG ルビー 0.94ct・ダイヤモンド0.66ctペンダントトップ（ネックレストップ）　鑑別書

[Published on 22602611] [Carafur] K18WG Ruby 0.94ct Pendant Top (Necklace Top) Sale price¥158,000

インターナリーフローレスダイヤモンド（H&C） 5.1mm/0.527ctルース(E, IF, 3Excellent H&C)

[Lottery Sale 0530_06] Internally Flawless Diamond (H&C) 0.527ct Loose Stone (E, IF, 3Excellent H&C) Sale price¥228,000

インターナリーフローレスダイヤモンド 0.272ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA Sale price¥138,000

Brazilian Paraiba Tourmaline 0.360ct Loose GIA Sale price¥298,000

[Colorful] K18 Blue Sapphire 1.89ct / Diamond 0.74ct Ring with Appraisal Report Sale price¥298,000

K18 白蝶真珠（白蝶パール）鳥モチーフペンダントトップ（ネックレストップ）鑑別書

【Qalafuri】K18 White South Sea Pearl, 0.17ct Diamond, Ruby, Sapphire, Emerald Bird Motif Pendant Top with Appraisal Sale price¥198,000

モザンビーク産パライバトルマリン 0.784ctルース（CuO:0.3%,MnO:1.3%）

[12550887] Paraiba Tourmaline from Mozambique 0.784ct loose stone Sale price¥128,000

[Calafuri] K18 Blue Sapphire and Diamond Ring Appraisal Report Sale price¥128,000

Brazilian Paraiba Tourmaline 0.341ct loose stone (CuO:1.81%, MnO:1.96%) Nakahokan analysis report Sale price¥598,000

Royal Blue Sapphire 0.730ct Loose AIGS Sale price¥158,000

【Carafuru】K18WG Diamond 1.03ct Pendant Top Sale price¥128,000

[12552306] Iolite 14.158ct loose stone Sale price¥258,000

Pt900 ブルーサファイア 2.38ct・ダイヤモンド0.20ctリング鑑別書

[Calafuri] Pt900 Blue Sapphire 2.38ct Diamond 0.20ct Ring with Identification Report Sale price¥198,000

0.210ct Colombian Non-Oil Emerald Loose Stone GIA Sale price¥228,000

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.