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Sold out スペイン産スファレライト 2.374ctルース

Spanish Sphalerite 2.374ct loose stone
Sold out Unheated Brazilian Paraiba Tourmaline 0.088ct loose stone (CuO: 1.9%, MnO: 2.3%)

Unheated Brazilian Paraiba Tourmaline 0.088ct loose stone (CuO: 1.9%, MnO: 2.3%)
Sold out カンボジア産ブルージルコン 0.744ctルース

Cambodian Blue Zircon 0.744ct Loose Stone
Sold out ロシア産ダイヤモンド原石（ソーヤブル） 0.098ct原石

[Sale 10 PM, June 26] Rough Russian Diamond (Sawable) 0.098ct (Trigon)
Sold out マダガスカル産カナリーイエロークリソベリル 0.292ctルース

[On sale June 26th at 10 PM] Madagascar Canary Yellow Chrysoberyl 4.2mm/0.292ct Loose Stone with Certificate
Sold out 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） 0.640ctルース

【Sale begins June 25th at 10 PM JST】 Madagascar Andesine-Labradorite (Common Name: Rainbow Moonstone) 0.640 ct Loose Stone
Sold out 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） 0.610ctルース

[On sale 10 PM JST, June 23] Madagascar Andesine-Labradorite (Common name: Rainbow Moonstone) 5.0mm/0.610ct Loose Stone

Sold out アメリカ産シーライト 1.943ctルース

#202607 Akihabara Pop-up Store - Currently out for display. [Sales start: June 25th, 10 PM JST] American Scheelite 1.943ct Loose Stone with Certificate
Sold out ジンバブエ産ユークレース 0.070ctルース

【On Sale 6/25 10 PM JST】Euclase from Zimbabwe 0.070 ct Loose Stone with Certificate
coming soon [Listed as 32501940] Internally Flawless Diamond (H&C) 0.215ct Loose (E, IF, 3Excellent H&C)

[Listed as 32501940] Internally Flawless Diamond (H&C) 0.215ct Loose (E, IF, 3Excellent H&C) Sale price¥75,800
coming soon 【32501941掲載】ピンクダイヤモンド 0.108ctルース(FANCY LIGHT BROWNISH PINK, SI2)

[Listed as 32501941] Pink Diamond 0.108ct Loose (FANCY LIGHT BROWNISH PINK, SI2) Sale price¥188,000
coming soon [Item 32501942] Pink Diamond 0.100ct Loose (FANCY BRONISH PINK, SI2)

[Item 32501942] Pink Diamond 0.100ct Loose (FANCY BRONISH PINK, SI2) Sale price¥35,800
coming soon Internally Flawless Diamond (H&C) 0.300ct Loose Stone (D, IF)

Internally Flawless Diamond (H&C) 0.300ct Loose Stone (D, IF) Sale price¥118,000
coming soon [32501947 Posted] Diamond 0.324ct Loose Stone (D, VVS1, 3Excellent) GIA & CBT

[32501947 Posted] Diamond 0.324ct Loose Stone (D, VVS1, 3Excellent) GIA & CBT Sale price¥98,000
coming soon [#202607 Akihabara Popup On Loan] [Listed as 32501948] Diamond 0.330ct Loose (E, VS1, 3Excellent) GIA & Chubo

[#202607 Akihabara Popup On Loan] [Listed as 32501948] Diamond 0.330ct Loose (E, VS1, 3Excellent) GIA & Chubo Sale price¥98,000
Sold out グリーンダイヤモンド（トリートメント） 0.183ctルース(FANCY INTENSE YELLOW GREEN TREATED, VS1)

【On sale June 26th, 10 PM JST】 Apple Green Diamond (Treated) 3.6mm/0.183ct Loose (FANCY INTENSE YELLOW GREEN TREATED, VS1)
coming soon 【22602589掲載】K18/Pt950 ブラジル産パライバトルマリン 0.064ct ペンダントトップ（ネックレストップ）

【#202607 Akihabara Pop-up Store - Currently Removed for Display】【Lottery Sale 11】【For Winners Only】【Published on 22602589】K18/Pt950 Brazilian Paraiba Tourmaline 0.064ct and Diamond 0.006ct Pendant Top (CuO: 1.8%, MnO: 2.1%) Sale price¥128,000
Sold out Pt950 ブラジル産パライバトルマリン 0.043ct リング

Pt950 Brazilian Paraiba Tourmaline 0.043ct/Diamond 0.013ct Ring (CuO: 1.6%, MnO: 2.3%)

Sold out Amethyst 9.860ct loose stone

Amethyst 9.860ct loose stone
Sold out アルマンディンガーネット 0.660ctルース

Almandine Garnet 0.660ct Loose
Sold out 合成オパール 1.804ctルース

Synthetic Opal 1.804ct Loose
Sold out ボリビア産アメトリン16.867ctルース

Bolivian Ametrine 16.867ct loose stone
Sold out K18 ルビー 0.44ct・ダイヤモンド0.18ctリング 鑑別書

[Sale starts June 22nd, 10 PM] Colorful K18 Ruby 0.44ct & Diamond 0.18ct Ring with Appraisal Report
Sold out K18PG 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） ペンダントトップ（ネックレストップ）鑑別書

[On sale June 22 at 10 PM] [Colorful] K18PG Andesine and Labradorite (common name Rainbow Moonstone) Pendant Top (Necklace Top) with certification
Sold out K18 アメトリン ペンダントトップ（ネックレストップ） 鑑別書

[Sales start 10 PM JST on 6/22] Colorful K18 Ametrine Cat Motif Pendant Top (Necklace Top) with Appraisal
Sold out イエローダイヤモンド（トリートメント） 0.190ctルース(FANCY INTENSE YELLOW*, SI-2)

[Sale starts at 10 PM on June 20th] Yellow Diamond (treated) 0.190ct Loose Stone (FANCY INTENSE YELLOW, SI-2)
Sold out ダイヤモンド 0.144ctルース(I, VS1, Good)

[On sale 6/20 10 PM JST] Loose Diamond 3.4mm/0.144ct (I, VS1, Good)
Sold out K14WG ブラックダイヤモンド 0.89ct ペンダントトップ（ネックレストップ）

[On sale June 25, 10 PM] [Colorful] K14WG Black Diamond 0.89ct / Diamond 0.13ct Pendant Top (Necklace Top) with Certificate of Authenticity
Sold out K18WG グリーンクォーツ・ダイヤモンド0.02ctペンダントトップ（ネックレストップ）

[On sale June 25th at 10 PM] [ColorFuli] K18WG Green Quartz and 0.02ct Diamond Pendant Top
Sold out [On sale July 3 at 10 PM JST] From Hong Kong: Afghani Green Hauyne, single stone, all stones with a gemological certificate. (Multiple purchase discount available)

[On sale July 3 at 10 PM JST] From Hong Kong: Afghani Green Hauyne, single stone, all stones with a gemological certificate. (Multiple purchase discount available)

Sold out ジンバブエ産ユークレース 0.054ctルース 鑑別書

[On Sale June 28th, 10 PM JST] Zimbabwe Euclase 0.054ct Loose Gemstone with Certificate
Sold out アレキサンドライト 0.320ctルース

0.320 ct Sri Lankan Alexandrite Loose Stone, GIA

coming soon [#202607 Akihabara Pop-up Store - Currently Out of Store] [Lottery Sale ④] [For Winners Only] [Listed as 12563379] Unheated Color Change Sapphire from Sri Lanka, 1.140ct Loose Stone, GIA

[#202607 Akihabara Pop-up Store - Currently Out of Store] [Lottery Sale ④] [For Winners Only] [Listed as 12563379] Unheated Color Change Sapphire from Sri Lanka, 1.140ct Loose Stone, GIA Sale price¥258,000
coming soon [Lottery Sale 13] [For Winners Only] [12563396] Brazilian Rutile (Single Crystal) 1.474ct Loose Gemstone with Certification

[Lottery Sale 13] [For Winners Only] [12563396] Brazilian Rutile (Single Crystal) 1.474ct Loose Gemstone with Certification Sale price¥39,800
Sold out ブラジル産アレキサンドライト 0.286ctルース

[On sale June 30th at 10 PM] Brazilian Silky Alexandrite 0.286ct Loose Stone with Certificate
Sold out マダガスカル産ペツォッタイト 0.202ctルース

[On sale June 30th, 10 PM JST] Petzottaite from Madagascar, 0.202ct Loose Gemstone with Certificate
Sold out アフガニスタン産グリーンアウイナイト 0.142ctルース

[On sale June 28th at 10 PM] Afghan Green Hauyne 0.142ct Loose Gemstone with Certificate
Sold out アメリカ産ネプチュナイト 0.162ctルース

U.S.-origin Neptunite 0.162ct Loose Stone with Gemstone Report

Sold out ブラジル産ラズライト（天藍石） 0.022ctルース

[#202607 Akihabara Pop-up Store Relocation] [On Sale June 27, 10 PM JST] Brazilian Lazulite 0.022ct Loose Stone with Certificate
Sold out ブラジル産バイカラーパライバトルマリン 0.190ctルース

Brazilian Bi-color Paraiba Tourmaline 0.190ct Loose (CuO: 2.06% MnO: 1.31%) with Japan-Germany Gemological Analysis Report

Sold out アメリカ産ネプチュナイト 0.224ctルース

American Neptunite 4.0mm/0.224ct Loose Gemstone with Certificate

Sold out 中国・湖南省シンシャ（辰砂・シナバー） 1.508ctルース

[Sales begin June 27th, 10 PM] Chinese Hunan Cinnabar 1.508ct Loose Stone with Certification
Sold out 中国・湖南省シンシャ（辰砂・シナバー） 1.750ctルース

[On sale June 27th, 10 PM JST] Chinese Cinnabar from Hunan Province, 1.750ct Loose Stone with Certificate
coming soon 【12562562掲載】非加熱モンタナサファイア（ヨーゴ産） 0.186ctルース

[Lottery Sale 0731_07] Unheated Montana Sapphire (Yogo Mine) 0.186ct Loose Stone with Japan-Germany Gemological Analysis Report Sale price¥98,000
Sold out パパラチアサファイア 0.282ctルース

[#202607AkihabaraPopUpCurrentlyOut] Padparadscha Sapphire 0.282ct Loose Stone

coming soon [Lottery Sale 0805] Yellow Sapphire 2.190ct Loose Stone

[Lottery Sale 0805] Yellow Sapphire 2.190ct Loose Stone Sale price¥158,000
Sold out オレゴンサンストーン 0.713ctルース

Oregon Sunstone 0.713ct loose
Sold out タンザナイト 0.760ctルース

Tanzanite 0.760ct loose stone (sugarloaf cut)

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.