Cabochon Cut

【9/18 22時販売】タイ産ブラックスターサファイア 7.437ctルース Sale price¥19,800

【9/19 22時販売】メキシコ産カンテラオパール 24.256ctルース Sale price¥69,800

【9/19 22時販売】メキシコ産ファイアーアゲート 5.272ctルース Sale price¥9,800

【9/17 22時販売】中国・湖南省シンシャ（辰砂・シナバー） 0.532ctルース鑑別書 Sale price¥15,800

【9/17 22時販売】中国・湖南省シンシャ（辰砂・シナバー） 0.467ctルース鑑別書 Sale price¥14,800

【9/17 22時販売】中国・湖南省シンシャ（辰砂・シナバー） 0.436ctルース鑑別書 Sale price¥13,800

【9/13 22時販売】ブラジル産ロードナイトインクォーツ 1.125ctルース Sale price¥9,800

【9/12 22時販売】ケニア産非加熱ゴールドシーンサファイア 0.314ctルース鑑別書 Sale price¥22,800

【9/12 22時販売】ケニア産非加熱ゴールドシーンサファイア 0.329ctルース鑑別書 Sale price¥25,800

【9/17 22時販売】ケニア産非加熱ゴールドシーンサファイア 0.408ctルース鑑別書 Sale price¥25,800

【9/17 22時販売】ケニア産非加熱ゴールドシーンサファイア 0.531ctルース鑑別書 Sale price¥18,800

【9/17 22時販売】ケニア産非加熱ゴールドシーンサファイア 0.166ctルース鑑別書 Sale price¥12,800

【9/17 22時販売】ケニア産非加熱ゴールドシーンサファイア 0.188ctルース鑑別書 Sale price¥15,800

【9/17 22時販売】ケニア産非加熱ゴールドシーンサファイア 0.398ctルース鑑別書 Sale price¥25,800

【9/5 22時販売】ブラジル産パライバトルマリン 4.022ctルース Sale price¥45,800

【9/7 22時販売】スリランカ産クリソベリルキャッツアイ 4.3mm/0.526ctルース Sale price¥15,800

【9/11 22時販売】スリランカ産クリソベリルキャッツアイ 4.2mm/0.537ctルース Sale price¥18,800

[#202607 Akihabara Pop-up Store - Currently Removed from Stock] [12554030 Listed] Alexandrite Cat's Eye 1.655ct Loose Stone Sale price¥98,000

[Published on 12563859] Australian black opal, 1.184ct loose stone Sale price¥45,800

[Listing 12563862] Australian Black Opal 1.392ct Loose Sale price¥69,800

【9/1 22時販売】ブラジル産パライバトルマリンインクォーツ 2.737ctルース Sale price¥45,800

【9/3 22時販売】高知県産血赤珊瑚 1.336ctルース Sale price¥9,800

【9/3 22時販売】高知県産血赤珊瑚 1.235ctルース Sale price¥9,800

[Sales begin August 24 at 10 PM JST] 0.830ct Red Coral Loose Stone from Kochi Prefecture Sale price¥9,800

[Sales begin 8/24 22:00] Kochi Prefecture Produced Deep Red Coral 0.984ct Loose Stone Sale price¥9,800

[On sale August 24th at 10 PM] Kochi Prefecture Red Coral 1.370ct Loose Stone Sale price¥11,800

[On sale August 24th at 10 PM] Kochi Prefecture Blood Coral 0.939ct Loose Stone Sale price¥9,800

[On sale 8/23 10 PM JST] Brazilian Rio Grande do Norte Apatite Cat's Eye 7.0mm/ 2.219ct Loose Stone with Appraisal Sale price¥22,800

[Sales start August 23rd at 10 PM] Brazilian Rio Grande do Norte Apatite Cat's Eye 1.782ct Loose Stone with Certificate Sale price¥25,800

[On sale August 23rd at 10 PM] Apatite Cat's Eye from Rio Grande do Norte, Brazil, 1.295ct Loose Stone with Certificate Sale price¥19,800

[On sale 8/23 10 PM JST] Brazilian Apatite Cat's Eye from Rio Grande do Norte, 5.0mm/0.740ct Loose Stone with Certificate Sale price¥14,800

Kochi Prefecture Aka Coral 4.627ct Loose Gemstone Sale price¥22,800

[Posted on 12563864] Australian Black Opal 1.797ct Loose Stone Sale price¥69,800

[Listed as 12564065] Brazilian Tourmaline Cat's Eye 0.689ct Loose Gemstone Sale price¥11,000

[Published as 12564054] Kochi Prefecture Coral 8.132ct Loose Stone Sale price¥69,800

[Posted as 12563996] Australian Black Opal 1.029ct Loose Stone Sale price¥29,800

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

[On sale August 9, 10 PM] Australian Opal 0.674ct Loose Stone with Certificate Sale price¥8,800

[Listed on 12562258] Eudialyte from Canada 2.796 ct loose stone Sale price¥39,800

Kochi Prefecture Aka Sango (Red Coral) 1.439ct Loose Stone Sale price¥9,800

Kochi Prefecture-produced red coral 0.978ct loose stone Sale price¥9,800

Kochi Prefecture Aka珊瑚 (Red Coral) 1.128ct Loose Stone Sale price¥9,800

【Sales begin August 12, 10 PM JST】Kochi Prefecture-produced Oxblood Coral 0.908ct Loose Stone Sale price¥9,800

[Sale on 8/16 at 10 PM] Kochi Prefecture Blood Coral 1.400ct Loose Stone Sale price¥9,800

Kochi Prefecture-sourced deep red coral, 1.238ct loose stone Sale price¥9,800

Kochi Prefecture Blood Coral 1.286ct Loose Stone Sale price¥9,800

Kochi Prefecture-produced Red Coral 1.379 ct Loose Stone Sale price¥11,800

Colombia Emerald Cat's Eye 0.060ct Loose, Hōki Kyō Sale price¥15,800

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.