La line

[Item 12561430] Unheated Pigeon Blood Ruby 0.510ct Loose Stone Sale price¥89,800

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

[Available 9/27 at 10 PM] Madagascar Andesine-Labradorite (Common name: Blue Moonstone) 4.518ct Loose Stone Sale price¥29,800

[9/14 (Mon) 10:00 AM Deadline: Lottery Sale_08] Unheated Pigeon Blood Ruby 0.270ct Loose Stone AIGS Sale price¥48,800

[Available 9/25, 10 PM] Pigeon Blood Ruby 3.6mm/0.220ct Loose Gemstone AIGS Sale price¥49,800

[Available 9/22, 10 PM] Unheated Pigeon Blood Ruby 0.310ct Loose AIGS Sale price¥49,800

[On sale 9/20 at 22:00] [Color-free] Pt950 Red Beryl 0.20ct / Diamond 0.23ct Ring with Appraisal Report Sale price¥98,000

[Lottery Sale 0818_12] Loose 0.251ct Red Beryl (USA) with Certificate Sale price¥98,000

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 1.742ctルース

Andesine-Labradorite (commonly known as Rainbow Moonstone) from Madagascar, 1.742ct loose gemstone Sale price¥37,800

アフガニスタン産アフガニスタン産ラズライトインソーダライト 0.425ctルース

[Available 9/18 10:00 PM] Lazulite in Sodalite from Afghanistan 0.425ct Loose Gemstone Sale price¥9,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.521ctルース

[9/20 10:00 PM Release] Madagascar Andesine Labradorite (Common name: Rainbow Moonstone) 0.521ct Loose Stone Sale price¥8,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.328ctルース

[Available 9/25 at 10 PM] Madagascar Andesine-Labradorite (Common name: Rainbow Moonstone) 0.328ct Loose Stone Sale price¥9,800

[On sale 9/21 at 22:00] Ruby 0.176ct Loose Stone Sale price¥15,800

Brazilian Rubellite 3.845ct loose stone Sale price¥158,000

Brazilian Rubellite 1.027ct Loose Stone Sale price¥69,800

アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 2.736ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 2.736ct loose stone Sale price¥69,800

アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 3.512ctルース

Bicolor Tourmaline from Afghanistan (common name: Bicolor Rubellite) 3.512ct loose Sale price¥89,800

アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 2.888ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 2.888ct Loose Sale price¥79,800

Mozambique rubellite 2.752ct loose stone Sale price¥69,800

Mozambique Rubellite 2.141ct Loose Stone Sale price¥69,800

[Available 9/13, 10:00 PM] Brazilian Rhodonite in Quartz 1.125ct Loose Stone Sale price¥9,800

[Lottery Sale 0620_03] South African Rhodochrosite 2.694ct Loose Stone Sale price¥228,000

【12552125掲載】デトロイトシティ産ロードクロサイト 0.439ctルース

Detroit City Rhodochrosite 4mm/0.439ct Loose Stone Sale price¥6,980

[On Sale 9/14, 10:00 PM] [Colorifi] Pt900 Ruby 0.71ct / Diamond 0.24ct Ring with Appraisal Report Sale price¥98,000

[Available 9/4 at 10 PM] Ruby 0.411ct Loose Stone Sale price¥18,800

【9/4 10:00 PM Sale】Ruby 0.200ct Loose Stone Sale price¥12,800

[Available 9/4 at 10 PM] Ruby 0.141ct loose stone Sale price¥9,800

Brazilian copper rutilated quartz 1.334ct loose stone Sale price¥8,800

South African Rhodochrosite 0.990ct Loose Stone by Nikkei Sale price¥128,000

【#202607 Akihabara Pop-up Store - Currently Removed from Stock】【Listed on 12563192】Unheated Ruby 0.210ct Loose Stone Sale price¥62,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.116ctルース

【#202607 Akihabara Pop-up Store - Currently Displayed Off-site】【Listed as 12563184】Madagascar Andesine-Labradorite (Common Name: Rainbow Moonstone) 0.116ct Loose Gemstone Sale price¥14,800

[#202607AkihabaraPop-upExhibition][12563418Posted] Burmese Ruby 0.303ct Loose Sale price¥9,800

Brazilian copper rutilated quartz 1.262ct loose stone Sale price¥6,980

Brazilian copper rutilated quartz 1.647ct loose stone Sale price¥6,980

Brazilian copper rutilated quartz 1.352ct loose stone Sale price¥6,980

[On sale 9/1 at 22:00] Pigeon Blood Ruby 0.350ct Loose Stone AIGS Sale price¥49,800

[Available 9/2, 10:00 PM] Pigeon Blood Ruby 0.325ct Loose Stone, JTL Certified Sale price¥69,800

[Available 9/3, 10 PM] Brazilian Rhodonite in Quartz 0.438ct Loose Stone Sale price¥8,800

[On sale 9/3 at 10:00 PM] Brazilian Rhodonite in Quartz 6.2mm/0.600ct Loose Stone Sale price¥9,800

[Published 22602679] [Calafuri] Pt900 Thai Ruby 1ct Ring Sale price¥298,000

[Published on 22602652] [Colorful] K18 Synthetic Opal Pendant Top Sale price¥16,800

Pt900 モザンビーク産ルビー 4mm/0.3ct ・ダイヤモンド0.16ctペンダントトップ（ネックレストップ）鑑別書

[Lottery Sale 0812_05] Pt900 Mozambique Ruby 4mm/0.3ct and Diamond 0.16ct Pendant Top (Necklace Top) with Identification Report Sale price¥59,800

[On sale August 25, 10 PM JST] Madagascar Labradorite 8.7mm/2.651ct Rose-Cut Loose Gemstone Sale price¥9,800

[On sale August 25th, 10 PM JST] Brazilian Rose Quartz 1.816ct Loose Gemstone Sale price¥12,800

Brazilian Rose Quartz Loose Stone 1.089ct [On Sale August 25th at 10 PM JST] Sale price¥14,800

[On sale August 25th, 10 PM] Ruby 0.168ct Loose Stone Sale price¥11,800

[On sale August 25th at 10 PM] Ruby loose stone, 0.268ct Sale price¥15,800

Pt900/K18 ルビー 0.28ct・ダイヤモンド0.20ct リング鑑別書

【#202607 Akihabara Pop-up Store - Currently Displayed Off-site】【On Sale June 22nd at 10 PM】【Colorfully】Pt900/K18 Ruby 0.28ct, Diamond 0.20ct Ring with Appraisal Sale price¥98,000

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.