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[On sale July 12th at 10 PM] "Limited to 15 Stones" All stones with GIA certificate. Madagascar Grandidierite 1 stone loose (average 0.065ct) "Multiple purchase discount available"

[On sale July 12th at 10 PM] "Limited to 15 Stones" All stones with GIA certificate. Madagascar Grandidierite 1 stone loose (average 0.065ct) "Multiple purchase discount available" Sale price¥9,800
[Sale starts 10PM on July 12] Limited 20 Stones: Grandidierite Single Stone Loose (Avg. 0.035ct) from Madagascar [Multiple Purchase Discount Available]

[Sale starts 10PM on July 12] Limited 20 Stones: Grandidierite Single Stone Loose (Avg. 0.035ct) from Madagascar [Multiple Purchase Discount Available] Sale price¥4,980
{June Campaign Limited Edition} Rare Stone Gacha💎 Padparadscha Sapphire 0.3ct+ with Certificate, Benitoite, Red Beryl, etc. Loose Stones for 1 Stone {Multiple Purchase Discounts Available}

{June Campaign Limited Edition} Rare Stone Gacha💎 Padparadscha Sapphire 0.3ct+ with Certificate, Benitoite, Red Beryl, etc. Loose Stones for 1 Stone {Multiple Purchase Discounts Available} Sale price¥7,980
ブラジル産アンフィボールインダンビュライト 1.361ctルース

[On Sale 10 PM, July 11] Brazilian Amphibole in Danburite, 1.361ct Loose Sale price¥14,800
ブラジル産アンフィボールインダンビュライト 2.251ctルース

[On sale July 11th at 10 PM] Brazilian Amphibole-in-Danburite 2.251ct Loose Stone with Japanese and German Identification Sale price¥29,800
マダガスカル産グランディディエライト 0.179ctルース

[On sale July 12th at 10 PM] Madagascar Grandidierite 0.179ct Loose Gemstone with Certificate Sale price¥35,800
マラウイ産ムーンストーン（マラウイムーンストーン） 1.651ctルース

[Sales begin 10 PM JST, July 12] Malawi Moonstone 1.651 ct Loose Stone Sale price¥8,800
マラウイ産ムーンストーン（マラウイムーンストーン） 2.184ctルース

[On sale July 12th at 10 PM] Malawi Moonstone 2.184ct Loose Sale price¥13,800
マラウイ産ムーンストーン（マラウイムーンストーン） 1.980ctルース

【On sale July 12th at 10 PM】Malawian Moonstone (Malawi Moonstone) 1.980ct Loose Sale price¥11,000
コロンビア産エメラルド 0.135ctルース

[On sale 7/12 at 10 PM] Colombian Emerald 0.135ct Loose Stone - Houki-kyo Sale price¥29,800
コロンビア産エメラルド 0.191ctルース

[On sale July 12th, 10 PM JST] Colombian Emerald, 0.191 ct loose stone, Hoki Kyokai Sale price¥45,800
ケニア産バイカラーグロッシュラーガーネット 0.809ctルース

[Available July 11, 10 PM JST] Kenya Bi-Color Grossular Garnet 0.809 ct Loose Stone Sale price¥25,800
ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 2.858ctルース

[On sale July 11, 10 PM] Brazilian Tinkerbell Quartz (Pink Fire Quartz) 2.858ct Loose Stone Sale price¥25,800
アメリカ産オレゴンサンストーン 1.397ctルース

[On sale 7/12 at 10 PM] US Oregon Sunstone 7.1mm/1.397ct Loose Stone Sale price¥39,800
アメリカ産オレゴンサンストーン 4.864ctルース

[On sale July 11th at 10 PM JST] USA Oregon Sunstone 10.8mm/4.864ct Loose Gemstone Sale price¥98,000
パイライトインクォーツ 5.600ctルース

[On sale July 11th at 10 PM] Brazilian Pyrite in Quartz, 5.600 ct. Loose stone Sale price¥9,800
ブルガリア産スファレライト 1.790ctルース

[On sale July 12th at 10 PM] Bulgarian Sphalerite 7.0mm/1.790ct Loose Stone Sale price¥59,800
アメリカ産オレゴンサンストーン 1.840ctルース

[On sale July 10th at 10 PM] US Oregon Sunstone 8.1mm/1.840ct Loose Sale price¥39,800
オーストラリア産オーストラリア産レインボーラティスサンストーン 2.902ctルース

[Sale on July 10th at 10 PM] Australian Rainbow Lattice Sunstone 2.902ct Loose Sale price¥29,800
オーストラリア産オーストラリア産レインボーラティスサンストーン 2.208ctルース

[Sale on 7/10 at 10 PM] Australian Rainbow Lattice Sunstone 2.208ct Loose Stone Sale price¥22,800
ブラジル産デュモルチェライトインクォーツ 1.684ctルース

[On sale July 10th at 10 PM] Brazilian Dumortierite in Quartz 1.684 ct Loose Stone Sale price¥12,800
ブラジル産デュモルチェライトインクォーツ 4.152ctルース

[On sale July 10 at 10 PM JST] Brazilian Dumortierite in Quartz, 4.152 ct loose stone Sale price¥25,800
[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¥3,980
[On sale July 10th, 10 PM JST] Anthill Garnet from USA (round cut, approx. 3mm) - Only 3 stones left! (Multiple purchase discount available)

[On sale July 10th, 10 PM JST] Anthill Garnet from USA (round cut, approx. 3mm) - Only 3 stones left! (Multiple purchase discount available) Sale price¥3,980
[On sale July 10th at 10 PM] Veatchite, Pakistan, Loose Stone (Avg. 0.04ct) - Limited to 23 Stones - Multiple Purchase Discount Available

[On sale July 10th at 10 PM] Veatchite, Pakistan, Loose Stone (Avg. 0.04ct) - Limited to 23 Stones - Multiple Purchase Discount Available Sale price¥4,980
[Sales start July 11th, 10 PM JST] 《Limited to 11 stones》 Madagascar Apatite Single Stone Loose (UV fluorescent type, average 1.0ct) 《Bulk purchase discount available》

[Sales start July 11th, 10 PM JST] 《Limited to 11 stones》 Madagascar Apatite Single Stone Loose (UV fluorescent type, average 1.0ct) 《Bulk purchase discount available》 Sale price¥2,980
ブラジル産アレキサンドライト 0.217ctルース

[Listing No. 12563397] Brazilian Alexandrite 0.217 ct Loose Stone Sale price¥39,800
タンザニア産レッドスピネル 0.098ctルース 鑑別書

[12563393 listed] Tanzanian Red Spinel 0.098ct Loose Stone Sale price¥15,800
マダガスカル産ペツォッタイト 0.200ctルース

[Listed 12563403] Petzottaite from Madagascar 0.200ct Loose Sale price¥29,800
【7/11 22時販売】《限定15石》通常29,800円のフォレストグリーン中宝ソ付きや通常22,800円のカナリーイエローやアイスブルーなどトリートダイヤガチャ《複数購入割引有》

【7/11 22時販売】《限定15石》通常29,800円のフォレストグリーン中宝ソ付きや通常22,800円のカナリーイエローやアイスブルーなどトリートダイヤガチャ《複数購入割引有》 Sale price¥3,980
K9 ブルーサファイア・ダイヤモンドペンダントトップ（ネックレストップ） 鑑別書

[Published on 22602650] [Colorful] K9 Blue Sapphire Pendant Top (Necklace Top) Sale price¥18,800
K9 ルビー・ダイヤモンドペンダントトップ（ネックレストップ） 鑑別書

[Listed as 22602651] [Colorful] K9 Ruby Pendant Top (Necklace Top) Sale price¥19,800
Pt900ブラックオパール 3.17ct・ダイヤモンド0.105ctペンダントトップ（ネックレストップ） 鑑別書

[Listed in 22602653] [Colorflee] Black Opal 3.17ct Pendant Top (Necklace Top) Sale price¥128,000
Pt900 ブルーサファイア 2.67ct・ダイヤモンド0.75ctペンダントトップ（ネックレストップ）鑑別書

[Item 22602648] [Colorflee] Pt900 Blue Sapphire 2.67ct Pendant Top (Necklace Top) Sale price¥228,000
Pt850 ブルーサファイア 0.66ct・ダイヤモンド0.19ctリング 鑑別書

[22602646 listed] [Karafuri] Pt850 Blue Sapphire 0.66ct Ring Sale price¥59,800
[7/ 22:00 JST Release] Indian Green Phantom Quartz (Multiple Purchase Discount Available)

[7/ 22:00 JST Release] Indian Green Phantom Quartz (Multiple Purchase Discount Available) Sale price¥1,980
ロシア産ダイヤモンド原石（ソーヤブル） 0.124ct原石

[Listed as 12563264] Rough Russian Diamond (Sawable) 0.124ct Sale price¥39,800
シエラレオネ産ダイヤモンド原石（ソーヤブル） 0.072ct原石

Sierra Leonean Rough Diamond (Sawable) 0.072 ct. [12563273 Listed] Sale price¥22,800
ジンバブエ産バイカラーユークレース 0.055ctルース

[12563374 Posted] Bicolor Euclase from Zimbabwe, 0.055ct Loose Stone Sale price¥14,800
タンザニア産ジルコン 1.077ctルース

[Listing 12563380] Unset 1.077ct Tanzanian Zircon Sale price¥12,800
タンザニア産ジルコン 2.053ctルース

[Published on 12563384] Tanzanian Zircon 2.053ct Loose Sale price¥19,800
タンザニア産ピンクスピネル 0.148ctルース

[Posted on 12563395] Tanzanian Pink Spinel 0.148ct Loose Gemstone Sale price¥22,800
Limited 5 Stones: Synthetic Alexandrite Gacha (Princess Cut, 3.5-4.5mm) (Multi-Buy Discount Available)

Limited 5 Stones: Synthetic Alexandrite Gacha (Princess Cut, 3.5-4.5mm) (Multi-Buy Discount Available) Sale price¥18,800
アフガニスタン産グリーンアウイナイト 0.075ctルース

[Item 12563407] Afghan Green Hauyne 0.075ct Loose Stone Sale price¥29,800
カナダ産ユーディアライト 2.796ctルース

[Listed on 12562258] Eudialyte from Canada 2.796 ct loose stone Sale price¥39,800
ブラジル産ラズライト（天藍石） 0.048ctルース

[Published 12562264] Brazilian Lazulite 0.048ct Loose Sale price¥36,800
イエローサファイア 2.150ctルース

[Lottery Sale_0612_09] Yellow Sapphire 2.150ct Loose Gemstone GIT Sale price¥158,000
[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥10,000

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.