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ブラジル産ローズアメジスト 6.325ctルース

[Sale starts May 21st, 10 PM JST] Brazilian Rose Amethyst 6.325ct Loose Gemstone Sale price¥12,800
ブラジル産ラベンダークォーツ（スコロライト） 2.211ctルース

[On sale May 21st at 10 PM] Brazilian Lavender Quartz (Scorolite) 2.211ct Loose Stone Sale price¥12,800
ブラジル産カラーシフトアメジスト 6.559ctルース

【Sold from 22:00 on May 21】Brazilian Color-Shift Amethyst 6.559ct Loose Stone Sale price¥15,800
ブラジル産ラベンダークォーツ（スコロライト） 0.952ctルース

[On Sale May 21st, 10 PM] Brazilian Lavender Quartz (Scorolite) 0.952ct Loose Stone Sale price¥9,800
合成アレキサンドライト 0.379ctルース

[On sale May 22nd at 10 PM] Synthetic Alexandrite 4.3mm/0.379ct Loose Stone Sale price¥9,800
GGG（ガドリウムガリウムガーネット） 0.511ctルース

[Sale at 10 PM on May 22] GGG (Gadolinium Gallium Garnet) 0.511 ct Loose Stone Sale price¥12,800
合成アレキサンドライト 1.320ctルース

[On sale 5/22 at 10 PM] Synthetic Alexandrite 1.320ct Loose Gemstone Sale price¥19,800
インド産パロットクリソベリル 0.518ctルース

[On sale May 23rd, 10 PM JST] Indian Parrot Chrysoberyl 0.518 ct Loose Stone Sale price¥29,800
オーストラリア産ブラックオパール 1.393ctルース

[On Sale May 22 at 10 PM JST] Australian Black Opal 1.393ct Loose Stone Sale price¥48,800
オーストラリア産ブラックオパール 0.325ctルース

[On sale 5/22 at 10 PM] Australian Black Opal 0.325ct Loose Stone Sale price¥9,800
ダイヤモンド 0.141ctルース(E, VVS-2, EXCELLENT)

[On sale May 23rd at 10 PM] Diamond 3.4mm/0.141ct Loose Stone (E, VVS-2, EXCELLENT, H&C) Sale price¥36,800
ノンオイルエメラルド 1.370ctルース

Non-Oil Emerald 1.370ct Loose GIA Sale price¥1,580,000
奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.656ctルース

【Sale from 10 PM on May 23】Nara Prefecture Tenkawa Village Rainbow Garnet (Andradite Garnet) 4.8mm/0.656ct Loose Stone Sale price¥11,000
ブラジル産パライバトルマリン 0.170ctルース

[Sale on 5/23 at 10 PM JST] Brazilian Paraiba Tourmaline 0.170ct Loose Stone (CuO: 2.1%, MnO: 1.1%) Sale price¥258,000
K18 血赤珊瑚 ペンダントトップ（ネックレストップ）

[Available 5/23 10 PM] Colorful K18 Blood Coral 9.9mm Diamond Pendant Top (Necklace Top) with Certificate of Authenticity Sale price¥158,000
K18 ダイヤモンド 0.3ct ペンダント（ネックレス）

[On sale May 23 at 10 PM] [Colorfully] K18 Diamond 0.3ct Pendant Top (Necklace Top) Sale price¥39,800
K18WG ダイヤモンド 0.126ct ペンダント（ネックレス）

[On sale 5/23 at 10 PM] [Colorful] K18WG Diamond 0.126ct Pendant (Necklace) Sale price¥49,800
Jeremejevite 0.201ct loose stone

Jeremejevite 0.201ct loose stone Sale price¥29,800
コーネルピン 0.200ctルース

Tanzanian Kornerupine 0.200ct Loose Stone Sale price¥9,800
コーネルピン 0.201ctルース

Tanzanian Kornerupine 0.201ct loose stone Sale price¥14,800
コーネルピン 0.229ctルース

Tanzanian Kornerupine 0.229ct loose stone Sale price¥9,800
コーネルピン 0.220ctルース

Tanzanian Kornerupine 0.220ct loose stone Sale price¥6,980
コーネルピン 0.210ctルース

Tanzanian Kornerupine 0.210ct loose stone Sale price¥11,000
コーネルピン 0.300ctルース

Tanzanian Kornerupine 0.300ct Loose Stone Sale price¥18,800
ダイヤモンド 0.211ctルース(E, VS-2, Excellent)

[On sale May 27th at 10 PM] Diamond 3.8mm/0.211ct Loose (E, VS-2, Excellent) Sale price¥49,800
ダイヤモンド 0.197ctルース(E, VVS-1, VeryGood)

[On sale 5/27 10 PM] Diamond 3.8mm/0.197ct Loose (E, VVS-1, VeryGood) Sale price¥39,800
[Sales End on Monday, June 30th] "Bungo and Alchemist" x KARATZ Collaboration Jewelry Literary Ring [Akutagawa Ryunosuke Model]

[Sales End on Monday, June 30th] "Bungo and Alchemist" x KARATZ Collaboration Jewelry Literary Ring [Akutagawa Ryunosuke Model] Sale priceFrom ¥25,800
Pt900 ダイヤモンド 0.65ctct ペンダントトップ（ネックレストップ）

[Colorful] Pt900 Diamond 0.65ct Pendant Top Sale price¥89,800
K18 合成ルビー ペンダントトップ（ネックレストップ）

[On sale May 30th at 10 PM] [Colorfri] K18 Synthetic Ruby / Synthetic Spinel Pendant Top (Necklace Top) with Certificate of Authenticity Sale price¥98,000
メキシコ産ファイアオパール（ファセットカット） 0.501ctルース

[On sale May 30th at 10 PM] Mexican Fire Opal (faceted cut) 0.501ct Loose Sale price¥12,800
K18ベスビアナイト 0.63ct チャーム 鑑別書

[On sale May 31, 10 PM JST] [Colorfrui] Vesuvianite 0.63ct Charm with Certificate Sale price¥14,800
スペイン産アンダリュサイト 0.425ctルース

[On Sale June 3rd, 10 PM JST] Andalusite from Spain, 0.425 ct Loose Stone Sale price¥9,800
K18WG イエローサファイア 0.05ct ペンダントトップ（ネックレストップ）

[Calafuri] K18WG Yellow Sapphire 0.05ct Pendant Top (Necklace Top) Sale price¥79,800
K18 クォーツァイト ペンダントトップ（ネックレストップ）

【Calafuri】K18 Quartzite Pendant Top (Necklace Top) Sale price¥49,800
スペイン産アンダリュサイト 0.582ctルース

[On Sale June 7th, 10 PM] Andalusite from Spain, 0.582 ct loose stone Sale price¥7,980
パキスタン産カイヤナイト 0.764ctルース

[On sale June 7th at 10 PM] Nepal Green Kyanite 0.764ct Loose Stone Sale price¥6,980
オーストラリア産ボルダーオパール 12.216ctルース

[On sale June 7, 10 PM JST] Australian Boulder Opal 12.216ct Loose Stone Sale price¥15,800
オーストラリア産ボルダーオパール 41.775ctルース

[On sale June 7th at 10 PM] Australian Boulder Opal 41.775ct Loose Stone Sale price¥19,800
スペイン産アンダリュサイト 0.536ctルース

[On sale June 7th at 10 PM] Andalusite from Spain, 0.536ct loose stone Sale price¥9,800
スペイン産アンダリュサイト 0.571ctルース

[On sale June 7th at 10 PM] Spanish Andalusite 0.571ct Loose Gemstone Sale price¥7,980
スペイン産アンダリュサイト 0.930ctルース

[On sale at 10 PM on June 7] Andalusite from Spain, 0.930ct loose gemstone Sale price¥12,800
スリランカ産エンスタタイト 2.567ctルース

[On Sale June 13, 10 PM JST] Sri Lankan Enstatite 2.567ct Loose Stone with Japan-Germany Gemological Report Sale price¥18,800
Sold out [On sale June 8th at 10 PM] Limited to 10 Stones: Top Quality Benitoite Loose Stone (2mm, round cut) - Multiple Purchase Discount Available

[On sale June 8th at 10 PM] Limited to 10 Stones: Top Quality Benitoite Loose Stone (2mm, round cut) - Multiple Purchase Discount Available
Sold out Have fun guessing what you'll receive! Gacha set of two gemstones (including rare stones) (Multiple purchase discounts available)

Have fun guessing what you'll receive! Gacha set of two gemstones (including rare stones) (Multiple purchase discounts available)
Sold out Set of 2 Tanzanite stones from Tanzania (2mm, round cut) {Multiple purchase discount available}

Set of 2 Tanzanite stones from Tanzania (2mm, round cut) {Multiple purchase discount available}
Sold out Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available}

Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available}
Sold out Limited to 20 stones! Includes 6 red gemstones of pigeon blood ruby ​​with AGL certificate. Discounts available for multiple purchases.

Limited to 20 stones! Includes 6 red gemstones of pigeon blood ruby ​​with AGL certificate. Discounts available for multiple purchases.
Sold out [Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire

[Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire

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.