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Limited to 13 stones! Tourmaline gacha featuring indigolite tourmaline worth ¥50,000 and rubellite worth ¥60,000. Plus, one canary yellow tourmaline. Discounts available for multiple purchases.

Limited to 13 stones! Tourmaline gacha featuring indigolite tourmaline worth ¥50,000 and rubellite worth ¥60,000. Plus, one canary yellow tourmaline. Discounts available for multiple purchases. Sale price¥6,980
[On sale July 10 at 10 PM] Limited 8 stones: Sweet Home Mine rhodochrosite single loose stone (average 0.1 ct) [Multiple purchase discount available]

[On sale July 10 at 10 PM] Limited 8 stones: Sweet Home Mine rhodochrosite single loose stone (average 0.1 ct) [Multiple purchase discount available] Sale price¥2,980
【8/30 22時販売】《限定15石》甲州貴石切子plusthreeローズクォーツ2石・フローラドロップカットを必ず含むローズクォーツガチャ（おまけで山本氏ローズクォーツ）《複数購入割引有》

【8/30 22時販売】《限定15石》甲州貴石切子plusthreeローズクォーツ2石・フローラドロップカットを必ず含むローズクォーツガチャ（おまけで山本氏ローズクォーツ）《複数購入割引有》 Sale price¥2,980
非加熱ルビー 0.210ctルース

【#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
ビルマ産ルビー 0.303ctルース

[#202607AkihabaraPop-upExhibition][12563418Posted] Burmese Ruby 0.303ct Loose Sale price¥9,800
ブラジル産コッパールチルクォーツ 1.262ctルース

Brazilian copper rutilated quartz 1.262ct loose stone Sale price¥6,980
ブラジル産コッパールチルクォーツ 1.647ctルース

Brazilian copper rutilated quartz 1.647ct loose stone Sale price¥6,980
コッパールチルクォーツ 1.352ctルース

Brazilian copper rutilated quartz 1.352ct loose stone Sale price¥6,980
【9/1 22時販売】ピジョンブラッドルビー 0.350ctルース AIGS

【9/1 22時販売】ピジョンブラッドルビー 0.350ctルース AIGS Sale price¥49,800
Pt900 タイ産ルビー 1.00ct・ダイヤモンド0.40ctリング GIA

[Published 22602679] [Calafuri] Pt900 Thai Ruby 1ct Ring Sale price¥298,000
[Published on 22602652] [Colorful] K18 Synthetic Opal Pendant Top

[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
マダガスカル産ラブラドライト 2.651ctルース

[On sale August 25, 10 PM JST] Madagascar Labradorite 8.7mm/2.651ct Rose-Cut Loose Gemstone Sale price¥9,800
ブラジル産ローズクォーツ 1.816ctルース

[On sale August 25th, 10 PM JST] Brazilian Rose Quartz 1.816ct Loose Gemstone Sale price¥12,800
ブラジル産ローズクォーツ 1.089ctルース

Brazilian Rose Quartz Loose Stone 1.089ct [On Sale August 25th at 10 PM JST] Sale price¥14,800
ルビー 0.168ctルース

[On sale August 25th, 10 PM] Ruby 0.168ct Loose Stone Sale price¥11,800
ルビー 0.268ctルース

[On sale August 25th at 10 PM] Ruby loose stone, 0.268ct Sale price¥15,800
モザンビーク産ルビー 0.409ctルース

[On sale 8/22 at 10 PM] Mozambique Ruby 0.409ct Loose Stone (Houseki Kyo) Sale price¥18,800
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
Pt900 ルビー 0.58ct・ダイヤモンド0.59ctリング 鑑別書

[Item ID: 22602669] [Karafuri] Pt900 Ruby 0.58ct Ring Sale price¥98,000
K18 ルビー 6.74ct ・ダイヤモンド0.91ct 鑑別書

[Published 22602698] [Karafuri] K18 Ruby 6.74ct Ring Diamond 0.91ct with identification report Sale price¥228,000
【12548939掲載】マダガスカル産ラズライトインクォーツ 1.600ctルース

Lazurite in quartz from Madagascar 7.5mm/1.600ct loose Sale price¥18,800
アメリカ産レッドベリル 0.239ctルース

[Published as 12564055] American Red Beryl 0.239ct Loose Stone Sale price¥69,800
ビルマ産ルビー 1.020ctルース

[Lottery Sale 0731_09] Burmese Ruby 1.020ct Loose Stone GIA Sale price¥188,000
モザンビーク産非加熱ピジョンブラッドルビー 0.430ctルース

[Lottery Sale 0725_10] Unheated Mozambique Pigeon Blood Ruby 0.430ct Loose Gemstone AIGS Sale price¥98,000
ビルマ産ピジョンブラッドルビー 0.450ctルース

[Lottery Sale 0725_11] Burmese Pigeon Blood Ruby 0.450ct Loose AIGS Sale price¥98,000
パキスタン産ラズライト（天藍石） 0.056ctルース

[Sale starts 8/14 at 10 PM JST] Pakistani Lazulite (blue spar) 0.056ct Loose Gemstone with Certificate Sale price¥11,800
パキスタン産ラズライト（天藍石） 0.116ctルース

[On Sale August 16th at 10 PM] Lazurite (Lapis Lazuli) from Pakistan, 0.116ct Loose Stone with Certificate Sale price¥24,800
パキスタン産ラズライト（天藍石） 0.063ctルース

[On sale 8/9 at 10 PM] Pakistani Lapis Lazuli (Lazurite) 0.063ct Loose Stone with Certificate Sale price¥14,800
パキスタン産ラズライト（天藍石） 0.054ctルース

[Sale at 10 PM on August 9] Pakistan Lazurite (Lapis Lazuli) 0.054ct Loose Gemstone with Certificate Sale price¥12,800
パキスタン産ラズライト（天藍石） 0.052ctルース

[Sale on August 9 at 10 PM] Pakistani Lazurite (Lapis Lazuli) 0.052ct Loose Stone with Certificate Sale price¥12,800
ブラジル産ルベライト 1.100ctルース

[Published 12563933] Brazilian Rubellite 1.100ct Loose Stone Sale price¥98,000
宝石研磨に挑戦してみよう「自分で出来る原石磨きセット」（中級者向け：ホワイトラブラドライト）

Let's try gemstone polishing "Do-it-yourself rough stone polishing set" (for intermediate users: white labradorite) Sale price¥3,980
Indian Andesine Labradorite (hexagonal cut, 3 x 5mm) 1 stone (discount available for multiple purchases)

Indian Andesine Labradorite (hexagonal cut, 3 x 5mm) 1 stone (discount available for multiple purchases) Sale price¥2,980
1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》

1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》 Sale price¥2,280
Brazilian rutilated quartz (rutile/rutile quartz (rutilated quartz)) 1 loose stone (6.0-6.5mm, for beginners) {Multiple purchase discounts available}

Brazilian rutilated quartz (rutile/rutile quartz (rutilated quartz)) 1 loose stone (6.0-6.5mm, for beginners) {Multiple purchase discounts available} Sale price¥2,580
ブラジル産ルチルレイテッドクォーツ1石ルース（6mm）《複数購入割引有》

Brazilian rutilated quartz (rutilated quartz) 1 loose stone (6mm) {Multiple purchase discounts available} Sale price¥1,500
Limited to 23 stones: Labradorite & Andesine Labradorite 2-stone set (Hexagonal cut, 3mm) Multiple purchase discounts available

Limited to 23 stones: Labradorite & Andesine Labradorite 2-stone set (Hexagonal cut, 3mm) Multiple purchase discounts available Sale price¥2,980
Limited to 25 stones: One loose rhodochrosite stone (4mm cabochon cut) from Sutton Holm, USA. Discounts available for multiple purchases.

Limited to 25 stones: One loose rhodochrosite stone (4mm cabochon cut) from Sutton Holm, USA. Discounts available for multiple purchases. Sale price¥4,580
Limited to 18 stones: Mozambique ruby ​​(princess cut, 2.3-2.5mm) Multiple purchase discounts available

Limited to 18 stones: Mozambique ruby ​​(princess cut, 2.3-2.5mm) Multiple purchase discounts available Sale price¥3,980
ルチルクォーツ1石ルース（12mm）《複数購入割引有》

Rutilated quartz 1 stone loose (12mm)《Multiple purchase discount available》 Sale price¥1,980
《Hong Kong Sourcing – Limited 24 Stones》Vivid Pakistan Lazulite Loose Stone 《Multiple Purchase Discount Available》

《Hong Kong Sourcing – Limited 24 Stones》Vivid Pakistan Lazulite Loose Stone 《Multiple Purchase Discount Available》 Sale price¥5,980
January birthstone rhodolite garnet rough stone and loose stone set of 2 (from Zambia) {Multiple purchase discounts available} {For beginners}

January birthstone rhodolite garnet rough stone and loose stone set of 2 (from Zambia) {Multiple purchase discounts available} {For beginners} Sale price¥2,980
ラブラドライト1石ルース（12×16mm）《複数購入割引有》

Labradorite 1 stone loose (12 x 16mm)《Multiple purchase discount available》 Sale price¥2,580
《Limited to 12 Stones》Madagascar Andesine-Labradorite (Rainbow Moonstone & Blue Moonstone) 2-Stone Set (Average 0.60ct)《Multiple Purchase Discount Available》

《Limited to 12 Stones》Madagascar Andesine-Labradorite (Rainbow Moonstone & Blue Moonstone) 2-Stone Set (Average 0.60ct)《Multiple Purchase Discount Available》 Sale price¥3,980
Limited to 11 stones: Brazilian rhodonite in quartz (cabochon, 7.5-8.5mm) 1 loose stone. Discounts available for multiple purchases.

Limited to 11 stones: Brazilian rhodonite in quartz (cabochon, 7.5-8.5mm) 1 loose stone. Discounts available for multiple purchases. Sale price¥2,980
Limited quantity: 1 impregnated ruby ​​loose (4mm, round cut, identification instructions included) Multiple purchase discounts available

Limited quantity: 1 impregnated ruby ​​loose (4mm, round cut, identification instructions included) Multiple purchase discounts available Sale price¥1,980

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.