Product list

[10/2 10 PM Release] Brazilian Ametrine 16.565ct Loose Gemstone Sale price¥29,800

[On sale 9/30 at 10 PM] Bolivian Ametrine 4.815ct Loose Stone Sale price¥12,800

[10/2 10 PM Sale] Bolivian Ametrine 4.234ct Loose Stone Sale price¥18,800

[Available Oct 2, 10:00 PM] Bolivian Ametrine 2.680ct Loose Stone Sale price¥12,800

[On sale 9/26 at 10 PM] Mexican Fire Opal 0.593ct Loose Stone Sale price¥11,800

[On sale 9/30 at 22:00] Malawi Moonstone 1.388ct Loose Stone Sale price¥8,800

Malawi Moonstone 2.639ct Loose Stone Sale price¥15,800

[Available 9/26 at 10 PM] Malawi Moonstone Loose Gemstone 1.966ct Sale price¥11,800

[9/26 10:00 PM Release] Malawi Moonstone 2.340ct Loose Stone Sale price¥14,800

[Available 9/26 at 10 PM] Malawi Moonstone Loose Gemstone, 2.229ct Sale price¥9,800

[Available 9/26 at 10 PM] Picture Agate 8.321ct Loose Stone Sale price¥9,800

[Available 9/30 at 10 PM] Nepal Kyanite 1.216ct Loose Gemstone (Royal Blue Color) Sale price¥15,800

[Available 10/1 at 10 PM] Australian Teal Blue Sapphire 0.555ct Loose Stone Sale price¥19,800

[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

[9/27 10:00 PM Release] Colombian Emerald 0.079ct Loose Stone Sale price¥8,800

[9/27 10:00 PM Release] Colombian Emerald 0.121ct Loose Stone Sale price¥15,800

[9/27 10 PM Sale] Colombian Emerald 0.148ct Loose Stone Sale price¥29,800

Colombian emerald 0.145ct loose stone Sale price¥35,800

【12564380】 Mongolian Andesine 1.236ct Loose Stone Sale price¥12,800

ブルーダイヤモンド 0.064ctルース(FANCY LIGHT GREEN BLUE, VS-1)

[9/14 (Mon) 10:00 AM Deadline: Lottery Sale_05] Blue Diamond 0.064ct Loose Stone (FANCY LIGHT GREEN BLUE, VS-1) Sale price¥298,000

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

[9/25 10 PM Release] Indonesian Parasitic Peridot 3.8mm/0.268ct Loose Gemstone, NGL Certified Sale price¥128,000

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

Pt900 アレキサンドライト 0.33ct ダイヤモンド0.11ct Xモチーフペンダントトップ（ネックレストップ）鑑別書

[Item #22602717] [Colorful] Pt900 Alexandrite 0.33ct Diamond 0.11ct Pendant Top (Necklace Top) with certificate Sale price¥128,000

[Available 9/23 at 10:00 PM] Sri Lankan Moonstone 1.440ct Loose Gemstone Sale price¥15,800

K18 ロシア産デマントイドガーネット（ホーステール認む） 3.5mm/0.155ct ダイヤモンド0.04ctリング鑑別書

[Available 9/25, 10:00 PM] [Coloriful] K18 Russian Demantoid Garnet (Horsetail inclusion verified) 3.5mm/0.155ct, Diamond 0.04ct Ring with Identification Report Sale price¥128,000

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

【Calafuri】Pt900 Ice Blue Diamond (Treated) 1.00ct Ring Sale price¥158,000

[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

【Available 9/20 at 10:00 PM】 Colorfuli K18 Aquamarine 0.65ct & Diamond 0.02ct Ring with Identification Card Sale price¥89,800

[On Sale 9/20 at 10 PM] [Colori] K18WG 0.09ct Diamond Treble Clef Motif Pendant Top (Necklace Top) Sale price¥39,800

Pt900/Pt850 ブラジル産パライバトルマリン 0.08ct（CuO:2.0%、MnO:1.1%）・ダイヤモンド 0.56ctペンダント（ネックレス）鑑別書

[Available 9/20 at 10 PM] [Colori] Pt900/Pt850 Brazilian Paraiba Tourmaline 0.08ct (CuO: 2.0%, MnO: 1.1%) & Diamond 0.56ct Pendant (Necklace) with Appraisal Report Sale price¥158,000

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

【Lottery Sale 0818_08】Brazilian Bicolor Tourmaline 2.744ct Loose Stone with Certificate Sale price¥59,800

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

【Listed as 12564080】Brazilian unheated purple-pink imperial topaz 0.343ct loose gemstone Sale price¥49,800

[Available 9/22, 10 PM] Colombian Emerald 0.150ct Loose Stone Sale price¥12,800

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） 1.742ctルース

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

Brazilian parti-color tourmaline 2.702ct loose stone Sale price¥69,800

[Available 9/18, 10 PM] [Colorafuri] K10 Aquamarine Ring with Appraisal Report Sale price¥39,800

[Available 9/30 at 10 PM] [Colori] Pt900 1.00ct Diamond Three-Stone Ring with Appraisal Report Sale price¥128,000

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 0.4ct ダイヤモンド0.33ctペンダントトップ（ネックレストップ）鑑別書

[Available 9/24 at 10 PM] [Colori] Pt900 Emerald 0.40ct & Diamond 0.33ct Pendant Top (Necklace Top) with Appraisal Report Sale price¥79,800

Pt900 トルマリンキャッツアイ 4.598ct ダイヤモンド0.20ctリング中央宝石研究所ソーティング

[Available 9/18 at 10:00 PM] [Coloriful] Pt900 Tourmaline Cat's Eye 4.598ct Diamond 0.20ct Ring 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.