Sa line

[Available 10/12 at 10 PM] Indian Iolite Sunstone 1.225ct Loose Gemstone Sale price¥9,800

[Available Oct 12, 10 PM] Indian Iolite Sunstone 1.113ct Loose Gemstone Sale price¥11,800

[Available 10/12 at 10:00 PM] Indian Iolite Sunstone 1.064ct Loose Gemstone Sale price¥9,800

[10/11 10 PM Release] Indian Iolite Sunstone 7.0mm/1.232ct Loose Gemstone Sale price¥8,800

[Available 10/12 at 10 PM] Tanzanian Sunstone (Illusion Sunstone) 4.124ct Loose Gemstone Sale price¥15,800

[10/12 10 PM Sale] Tanzanian Sunstone (Illusion Sunstone) 7.715ct Loose Stone Sale price¥24,800

[Available 10/12 at 10 PM] Tanzanian Sunstone (Illusion Sunstone) 2.888ct Loose Gemstone Sale price¥9,800

【Available 10/15, 10:00 PM】 Tanzanian Sunstone (Illusion Sunstone) 6.411ct Loose Gemstone Sale price¥19,800

[10/15 10 PM Sale] Tanzanian Sunstone (Illusion Sunstone) 5.158ct Loose Gemstone Sale price¥15,800

【Available Oct 15 at 10:00 PM】Tanzanian Sunstone (Illusion Sunstone) 5.162ct Loose Stone Sale price¥15,800

[Available 10/15 at 10 PM] Tanzanian Sunstone (Illusion Sunstone) 6.321ct Loose Stone Sale price¥18,800

[Available 10/14 at 10 PM] Tanzanian Sunstone (Illusion Sunstone) 1.383ct Loose Gemstone Sale price¥6,980

[10/13 10:00 PM Release] Tanzanian Cobalt Spinel 2.7mm/0.100ct Loose Stone with Identification Report Sale price¥39,800

[Available 10/11 at 10 PM] Tanzanian Cobalt Spinel 2.3mm/0.070ct Loose Gemstone with Identification Report Sale price¥22,800

[Available 10/9, 10 PM] Tanzanian Cobalt Spinel 2.1mm / 0.053ct Loose Gemstone with Identification Report Sale price¥19,800

[Item 12564612] Unheated Bicolor Sapphire from Windsor, Tanzania, 0.620ct Loose Gemstone Sale price¥75,800

【9/ 22:00 Release】《Limited to 13 stones》 Bicolor Sapphire, Avg 0.27ct 《Multi-buy discount available》 Sale price¥7,980

Pt900 ピンクサファイア 0.42ct ダイヤモンド 0.05ctリング日独鑑

[Item 22602811] [Coloriful] Pt900 Pink Sapphire 0.42ct Diamond 0.05ct Ring with Appraisal Report Sale price¥59,800

[Ref: 12564102] Pink Sapphire from Sri Lanka, 0.142ct loose stone Sale price¥9,800

[12563017 listed] Pink Sapphire 0.143ct Loose Stone Sale price¥12,800

ケニア産ケニア産ゴールドシーンサファイア（スターサファイア） 0.311ctルース

[Item 12564329] Kenyan Gold Sheen Sapphire (Star Sapphire) 0.311ct Loose Stone Sale price¥24,800

[Item 12564332] Kenyan Gold Sheen Sapphire 0.859ct Loose Gemstone Sale price¥59,800

[Lottery Sale_01][For Winners Only][Item 12564184] East African Unheated Bicolor Sapphire 0.510ct Loose GIA Sale price¥98,000

K18WG スリランカ産ブルーサファイア 1.22ct ダイヤモンド0.14ctリング鑑別書

[9/4 (Lottery Sale_11)] 18K White Gold Sri Lankan Blue Sapphire 1.22ct and Diamond 0.14ct Ring with Appraisal Report Sale price¥128,000

Pt900 スリランカ産パープルサファイア 4.3mm/0.35ctダイヤモンド0.54ctリング鑑別書

[9/14 (Mon) 10:00 AM Deadline: Lottery Sale_12] Pt900 Sri Lankan Purple Sapphire 4.3mm/0.35ct Diamond 0.54ct Ring with Appraisal Report Sale price¥158,000

【10/3 10 PM Release】Unheated Bicolor Sapphire from Winza, Tanzania 0.500ct Loose Gemstone with Identification Report Sale price¥59,800

[Available 10/2 at 10 PM] Unheated Bicolor Sapphire from Winza, Tanzania, 0.460ct Loose Stone with Gem Identification Report Sale price¥59,800

[Available 10/3 at 10 PM] Tanzanian Cobalt Spinel 3.6mm/0.187ct Loose Stone, JGL Origin Report Included Sale price¥98,000

[Available 10/3, 10:00 PM] Santa Maria Aquamarine from Brazil, 0.318ct loose stone, with certificate of authenticity Sale price¥29,800

[Available 10/2 at 10 PM] Sri Lankan Pink Sapphire 4.1mm/0.354ct Loose Gemstone with Appraisal Report Sale price¥22,800

[Deadline: 9/5 (Sat) 10 AM: Lottery Sale_11] Sri Lankan Blue Spinel 3.419ct Loose Stone with Identification Report Sale price¥158,000

[Deadline: Sat, Sep 5, 10:00 AM: Lottery Sale_09] Sri Lankan Unheated Color-Change Sapphire 1.170ct Loose Stone, GIA certified Sale price¥188,000

Royal Blue Sapphire 0.530ct Loose Stone Sale price¥69,800

Pt900 カラーチェンジサファイア0.446ct ダイヤモンド0.12ctリング鑑別書

[On sale 8/31 at 10 PM] [Colori] Pt900 Color-Change Sapphire 0.446ct Diamond 0.12ct Ring with Identification Report Sale price¥79,800

Pt900 スピネル 0.35ct・ダイヤモンド0.09ctペンダントトップ（ネックレストップ）鑑別書

[Item No. 22602792] [Colorify] Pt900 Spinel 0.35ct / Diamond 0.09ct Pendant Top (Necklace Top) with Appraisal Report Sale price¥39,800

[Item 12564350] Ethiopian Sunstone 1.228ct Loose Gemstone Sale price¥18,800

[9/27 10:00 PM Release] Oregon Sunstone (USA) 6.9mm/1.093ct Loose Gemstone Sale price¥29,800

[Available 9/27 at 10 PM] Oregon Sunstone 3.492ct Loose Gemstone Sale price¥55,800

[9/27 10:00 PM Release] Oregon Sunstone (USA) 6.9mm/1.094ct Loose Gemstone Sale price¥39,800

K18WG ブルーサファイアダイヤモンド0.051ctペンダントトップ（ネックレストップ）鑑別書

[22602720 listed] [Colorfury] K18WG Blue Sapphire Diamond 0.051ct Pendant Top (Necklace Top) with certificate Sale price¥39,800

[On sale 9/25 at 22:00] [Color-free] Pt900 Royal Blue Sapphire 0.84ct Ring with Identification Report Sale price¥148,000

[#202607 Akihabara Pop-up Store Takeout][Shinjuku Marui Annex 202605 Takeout][12548265 Listed] Padparadscha Sapphire 0.545ct Loose Stone Sale price¥69,800

K18WG マルチカラーサファイア0.83ct・ダイヤモンド0.70ct 3WAYクロスペンダント（ネックレス）鑑別書

[Available 9/25, 10 PM] [Color-free] K18WG Multicolor Sapphire 0.83ct / Diamond 0.70ct 3-Way Cross Pendant (Necklace) with Appraisal Report Sale price¥198,000

Pt900 ティールグリーンサファイア 0.46ct ダイヤモンド0.10ctリング鑑別書

[Available 9/24 10:00 PM] [Colori] Pt900 Teal Green Sapphire 0.46ct Diamond 0.10ct Ring with Appraisal Report Sale price¥89,800

Pt900 エメラルド 5.33ct サファイア4.52ct、ダイヤモンド0.12ctリング宝貴協

[On sale 9/24 at 22:00] [Colorfully] Pt900 Emerald 5.33ct, Sapphire 4.52ct, Diamond 0.12ct Ring (JGA Certified) Sale price¥198,000

[Available 9/30 at 10:00 PM] Jeremejevite from Namibia, 0.061ct loose stone, with identification report Sale price¥15,800

[Available 9/19 at 10 PM] Jeremejevite from Namibia, 0.054ct loose stone with identification report Sale price¥14,800

[9/19 10 PM Sale] Jeremejevite from Namibia 0.053ct Loose Stone with Appraisal Report Sale price¥14,800

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.