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[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¥12,800
[On sale 8/15 at 10 PM JST] Colombian Emerald Gacha featuring Shimizu Kisaki's 8mm Clover In-cut (regularly 79,800 JPY) - only 15 stones available! (Bonus green beryl included) [Multiple purchase discount available]

[On sale 8/15 at 10 PM JST] Colombian Emerald Gacha featuring Shimizu Kisaki's 8mm Clover In-cut (regularly 79,800 JPY) - only 15 stones available! (Bonus green beryl included) [Multiple purchase discount available] Sale price¥6,980
[On sale August 14th, 10 PM] Limited 10 pieces: Zimbabwe Mint Fluorite Single Stone Loose (average 2.2ct) [Bulk purchase discount available]

[On sale August 14th, 10 PM] Limited 10 pieces: Zimbabwe Mint Fluorite Single Stone Loose (average 2.2ct) [Bulk purchase discount available] Sale price¥4,580
メキシコ産ファイアオパール 0.352ctルース

【8/30 22時販売】メキシコ産ファイアオパール 0.352ctルース Sale price¥7,980
メキシコ産ファイアオパール 1.270ctルース

[Camellia cut] Mexican fire opal 1.270ct loose with patch Sale price¥69,800
スイスブルートパーズ 3.230ctルース

[12553609] Swiss Blue Topaz 3.230ct Loose Sale price¥25,800
パパラチアサファイア 0.619ctルース

【#202607 Akihabara Pop-up Store - Currently Removed from Stock】【12563063 Listed】Padparadscha Sapphire 0.619ct Loose Stone Sale price¥138,000
パキスタン産ペリドット 5.2mm/0.562ctルース

Pakistani Peridot 5.2mm/0.562ct Loose Stone Sale price¥9,800
オーストラリア産ブラックオパール 1.184ctルース

[Published on 12563859] Australian black opal, 1.184ct loose stone Sale price¥45,800
オーストラリア産ブラックオパール 1.392ctルース

[Listing 12563862] Australian Black Opal 1.392ct Loose Sale price¥69,800
アメリカ産ペリドット 1.280ctルース

【9/1 22時販売】アメリカ産ペリドット 1.280ctルース Sale price¥18,800
アメリカ産ペリドット 0.803ctルース

【9/1 22時販売】アメリカ産ペリドット 0.803ctルース Sale price¥9,800
【9/1 22時販売】ブラジル産パライバトルマリンインクォーツ 4.3mm/0.327ctルース

【9/1 22時販売】ブラジル産パライバトルマリンインクォーツ 4.3mm/0.327ctルース Sale price¥18,800
【9/1 22時販売】ブラジル産パライバトルマリンインクォーツ 2.737ctルース

【9/1 22時販売】ブラジル産パライバトルマリンインクォーツ 2.737ctルース Sale price¥45,800
ミャンマー産ペリドット 3.748ctルース（スター効果有り）

[Posted 12549460] Star peridot from Myanmar 3.748ct loose Sale price¥19,800
ミャンマー産ペリドット 5.973ctルース（スター効果有り）

[Updated 12546024] Ametrine 4.206ct loose Sale price¥39,800
ペツォッタイト 0.062ctルース

[Sale starts August 25th at 10 PM JST] Madagascar Pezzottaite 2.7mm/0.062ct Loose Gemstone Sale price¥11,000
ブラジル産バイカラートルマリン 1.153ctルース

[12563744 listed] Bi-color Tourmaline from Brazil 1.153ct Loose Stone Sale price¥12,800
ブラジル産バイカラートルマリン 1.524ctルース 鑑別書

[Posted as 12563742] Brazilian Bicolor Tourmaline, 1.524 ct loose stone Sale price¥18,800
オーストラリア産ブラックオパール 1.797ctルース 鑑別書

[Posted on 12563864] Australian Black Opal 1.797ct Loose Stone Sale price¥69,800
Pt900ベニトアイト0.152ct・ダイヤモンド0.58ctリング

[Lottery Sale 1_202608_04] Pt900 Benitoite (USA) 0.152ct / Diamond 0.58ct Ring Sale price¥188,000
K18WG パライバトルマリン 0.09ct・ダイヤモンド0.06ctリング（CuO:1.0%、MnO:0.4%）ソーティング（一般社団法人 宝石貴金属協会）

[22602666 listed] [Colorful] K18WG Paraiba Tourmaline 0.09ct Ring Sale price¥198,000
アフガニスタン産ハックマナイト 0.300ctルース

[Listed as 12564020] Hackmanite 0.300ct Loose Stone Sale price¥59,800
ブラジル産バイカラートルマリン 7.489ctルース

Brazilian bicolor tourmaline 7.489ct loose Sale price¥39,800
マダガスカル産パパラチアサファイア 0.649ctルース 中宝鑑

[#202607 Akihabara Pop-up Store - Currently Displayed] [12563067 Listed] Padparadscha Sapphire 0.649ct Loose Stone Sale price¥128,000
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
オーストラリア産ブラックオパール 1.029ctルース

[Posted as 12563996] Australian Black Opal 1.029ct Loose Stone Sale price¥29,800
マダガスカル産パパラチアサファイア 0.164ctルース

[Posted on 12563959] Madagascar Padparadscha Sapphire 0.164ct Loose Stone Sale price¥36,800
[On sale August 16th at 10 PM JST] Limited to 4 stones: Swiss Blue Topaz (Star of David/Hexagram Cut, approx. 8mm) [Multiple purchase discount available]

[On sale August 16th at 10 PM JST] Limited to 4 stones: Swiss Blue Topaz (Star of David/Hexagram Cut, approx. 8mm) [Multiple purchase discount available] Sale price¥5,980
ブラジル産パライバトルマリン 0.068ctルース

Brazilian Paraiba Tourmaline 0.068ct loose stone Sale price¥61,800
ブラジル産スカイブルートパーズ 0.906ctルース

[#202607 Akihabara Pop-up Store Takeout in Progress] [12562065 Posted] Brazilian Sky Blue Topaz 0.906ct Loose Stone Sale price¥12,800
マダガスカル産ペツォッタイト 0.188ctルース 鑑別書

[#202607 Akihabara Popup Exhibit] [Published in 12563402] Petzottaite, Madagascar, 0.188ct Loose Sale price¥35,800
[Sales start 8/13 10 PM] Limited to 12 Stones! Beryl Gacha where you can win a 12mm camellia-cut Limonite in Beryl or Santa Maria Aquamarine with a certificate of authenticity for 45,800 yen. (Multiple purchase discount available)

[Sales start 8/13 10 PM] Limited to 12 Stones! Beryl Gacha where you can win a 12mm camellia-cut Limonite in Beryl or Santa Maria Aquamarine with a certificate of authenticity for 45,800 yen. (Multiple purchase discount available) Sale price¥4,580
【#202607 Akihabara Pop-up Store - Currently Removed for Display】[Colorfuri] Pt900 Black Opal 0.83ct / Diamond 0.62ct Ring with Certificate

【#202607 Akihabara Pop-up Store - Currently Removed for Display】[Colorfuri] Pt900 Black Opal 0.83ct / Diamond 0.62ct Ring with Certificate Sale price¥198,000
オーストラリア産ブラックオパール 0.530ctルース

[#202607 Akihabara Pop-up Store - Currently out on display] [Listed under item 12562542] Australian Black Opal 0.530ct Loose Stone Sale price¥14,800
アフガニスタン産ハックマナイト 0.110ctルース

[#202607 Akihabara Pop-up Store Takeout in Progress] [12559784 Posted] Hackmanite 0.110ct Loose Stone Sale price¥22,800
パキスタン産ルードヴィッヒアイトインペリドット 1.624ctルース

【#202607 Akihabara Pop-up Items Out for Display】【12555648 Posted】Ludwigite in Peridot from Pakistan 1.624ct Loose Sale price¥9,800
マダガスカル産パパラチアサファイア 3.9mm/0.314ctルース 中宝鑑

[Listed on 12563962] Madagascar Padparadscha Sapphire 0.314 ct Loose Stone Sale price¥69,800
Let's try jewelry polishing "Do-it-yourself rough stone polishing set" (for beginners: fluorite 2 stone set)

Let's try jewelry polishing "Do-it-yourself rough stone polishing set" (for beginners: fluorite 2 stone set) Sale price¥2,980
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」（初心者向け：フローライト・アパタイト2石セット）

Let's try gem polishing "Do-it-yourself rough stone polishing set" (for beginners: fluorite/apatite 2 stone set) Sale price¥2,980
"PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device-Inspired Ring with Inspector Design [Ginoza Nobuchika Model] "London Blue Topaz"

"PSYCHO-PASS" x KARATZ Collaboration Jewelry: Public Safety Bureau Criminal Investigation Division Device-Inspired Ring with Inspector Design [Ginoza Nobuchika Model] "London Blue Topaz" Sale priceFrom ¥25,800
Raw peridot + 2 loose stones set (August birthstone)《Discount available for multiple purchases》

Raw peridot + 2 loose stones set (August birthstone)《Discount available for multiple purchases》 Sale price¥2,980
《Limited to 18 Stones》Brazilian Paraiba Tourmaline Gacha with Sorting (CuO: 2.1%, MnO: 2.2%) Normally 45,800 JPY《Multiple Purchase Discount Available》

《Limited to 18 Stones》Brazilian Paraiba Tourmaline Gacha with Sorting (CuO: 2.1%, MnO: 2.2%) Normally 45,800 JPY《Multiple Purchase Discount Available》 Sale price¥9,800
Limited Edition Tucson Lucky Dip Gems 💎 Guaranteed 1 stone from 8 types (Benitoite, Anthill Garnet, Dumortierite in Quartz, Eudialyte, etc.) 《Multi-purchase discount available》

Limited Edition Tucson Lucky Dip Gems 💎 Guaranteed 1 stone from 8 types (Benitoite, Anthill Garnet, Dumortierite in Quartz, Eudialyte, etc.) 《Multi-purchase discount available》 Sale price¥3,980
ブラジル産カラーチェンジフローライト1石ルース（6mm,ラウンドカット）《複数購入割引有》

Color change fluorite from Brazil 1 stone loose (6mm, round cut)《Multiple purchase discount available》 Sale price¥2,580
Limited to 20 stones: Brazilian Paraiba tourmaline (cabochon cut, approximately 2.2 mm) [Multiple purchase discounts available]

Limited to 20 stones: Brazilian Paraiba tourmaline (cabochon cut, approximately 2.2 mm) [Multiple purchase discounts available] Sale price¥9,800
Chinese color change fluorite 1 stone loose (6mm, round cut) {Multiple purchase discount available}

Chinese color change fluorite 1 stone loose (6mm, round cut) {Multiple purchase discount available} Sale price¥1,980
Limited Quantity: 2mm Benitoite (Top Quality Ice Blue) (Multiple Purchase Discounts Available)

Limited Quantity: 2mm Benitoite (Top Quality Ice Blue) (Multiple Purchase Discounts Available) Sale price¥8,800

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.