¥50,000 - ¥100,000

[Calafri] K18 Blood Coral 9.9mm Diamond Pendant Top (Necklace Top) with Certificate of Authenticity Sale price¥79,800

[On sale 9/20 at 22:00] [Color-free] Pt950 Red Beryl 0.20ct / Diamond 0.23ct Ring with Appraisal Report Sale price¥98,000

【Available 9/20 at 10:00 PM】 Colorfuli K18 Aquamarine 0.65ct & Diamond 0.02ct Ring with Identification Card Sale price¥89,800

K18WG タンザナイト1.79ct・ダイヤモンド0.07ctペンダント（ネックレス）

[On sale 9/20 at 10:00 PM] [Colorifi] 18K White Gold Tanzanite 1.79ct / Diamond 0.07ct Pendant (Necklace) Sale price¥98,000

[Lottery Sale 0818_12] Loose 0.251ct Red Beryl (USA) with Certificate Sale price¥98,000

【Lottery Sale 0818_08】Brazilian Bicolor Tourmaline 2.744ct Loose Stone with Certificate Sale price¥59,800

[#202607 Akihabara Pop-up Store Takeout][Shinjuku Marui Annex 202605 Takeout][12548265 Listed] Padparadscha Sapphire 0.545ct Loose Stone Sale price¥69,800

Brazilian parti-color tourmaline 2.702ct loose stone Sale price¥69,800

Pt900 ティールグリーンサファイア 0.46ct ダイヤモンド0.10ctリング鑑別書

[Available 9/24 10:00 PM] [Colori] Pt900 Teal Green Sapphire 0.46ct Diamond 0.10ct Ring with Appraisal Report Sale price¥89,800

Pt900 エメラルド 0.4ct ダイヤモンド0.33ctペンダントトップ（ネックレストップ）鑑別書

[Available 9/24 at 10 PM] [Colori] Pt900 Emerald 0.40ct & Diamond 0.33ct Pendant Top (Necklace Top) with Appraisal Report Sale price¥79,800

Pt900 トルマリンキャッツアイ 4.598ct ダイヤモンド0.20ctリング中央宝石研究所ソーティング

[Available 9/18 at 10:00 PM] [Coloriful] Pt900 Tourmaline Cat's Eye 4.598ct Diamond 0.20ct Ring Sale price¥98,000

Pt900/Pt850 ピンクダイヤモンド 0.03ct・ダイヤモンド0.30ctペンダント（ネックレス）ミニ鑑別カード

[On sale 9/24 at 10 PM] [Colori] Pt900/Pt850 Pink Diamond 0.03ct & Diamond 0.30ct Pendant (Necklace) with Mini Identification Card Sale price¥79,800

[Available 9/19 at 10 PM] Mexican Cantera Opal 24.256ct Loose Stone Sale price¥69,800

Czech Aragonite 8.0mm/2.082ct Loose Stone Sale price¥59,800

Spanish Sphalerite 8mm/2.796ct loose stone Sale price¥69,800

Brazilian Rubellite 1.027ct Loose Stone Sale price¥69,800

アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 2.736ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 2.736ct loose stone Sale price¥69,800

アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 2.888ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 2.888ct Loose Sale price¥79,800

Namibian Jeremejevite 0.405ct loose stone Sale price¥79,800

Namibian Jeremejevite 0.394ct loose stone Sale price¥79,800

Mozambique rubellite 2.752ct loose stone Sale price¥69,800

Mozambique Rubellite 2.141ct Loose Stone Sale price¥69,800

Elbaite tourmaline from Mozambique 1.192ct loose stone (CuO: 0.1%, MnO: 1.5%) Sale price¥55,800

【甲州貴石切子】レピドクロサイトインクォーツ 44.310ct《コラボ》ルースワッペン付

[Koshu Precious Stone Kiriko] Lepidocrocite in Quartz 44.310ct《Collaboration》Loose with emblem Sale price¥55,800

[#202607 Akihabara Popup Out for Sale] [Lottery Sale 12] [For Winners Only] [12562560 Listed] Unheated Montana Sapphire (Yogo Origin) 0.159ct Loose with Certificate Sale price¥98,000

[Lottery Sale 0829] Cambodian Blue Zircon (Ratanakiri Blue) 3.363ct Loose Gemstone Sale price¥98,000

K18YG タンザニア産アルマンディンガーネット 1.003ct・ピンクサファイアリング

[Available 9/13, 10:00 PM] 18K Yellow Gold Tanzanian Almandine Garnet 1.003ct & Pink Sapphire Ring Sale price¥89,800

イエローダイヤモンド 0.285ctルース(UNDER N(VERY LIGHT YELLOW), VS-1)

[Available 9/12 at 10:00 PM] Yellow Diamond 0.285ct Loose Stone (VERY LIGHT YELLOW, VS-1) Sale price¥55,800

[9/7 10 PM Release] Brazilian Bicolor Tourmaline 3.337ct Loose Stone Sale price¥59,800

[Lottery Sale 0812_19] Bolivian Phosphophyllite 1.806ct Loose Stone with Gemstone Identification Report Sale price¥69,800

Pt900 キャシテライト 4mm/0.57ct ・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_03] Pt900 Cassiterite from Yunnan Province, China 4mm/0.57ct Diamond 0.16ct Pendant Top (Necklace Top) with Appraisal Certificate Sale price¥69,800

[Lottery Sale ②_202608_02] Unheated Kashmir Sapphire 2.6mm/0.110ct Loose Stone GIA Sale price¥79,800

Brazilian Morganite 4.720ct loose stone Sale price¥98,000

Cassiterite 1.658ct loose stone (bicolor cassiterite) Japan-Germany exchange Sale price¥98,000

[Lottery Sale 0707_10] Unheated Montana Sapphire (Yogo Mine) 0.173ct Loose Stone with Japan-Germany Gemological Report Sale price¥98,000

【Lottery Sale 0718_07】Tanzanian Pink Zoisite 0.398ct Loose Stone with Certificate Sale price¥59,800

[Lottery Sale ②_202608_07] Myanmar Orange Spinel 0.855ct Loose Stone Sale price¥98,000

Lottery Sale 0812_15: Brazilian Indicolite Tourmaline 3.756ct Loose Stone with Japan-Germany Gemological Report Sale price¥98,000

Brazilian Dolomite 4.070ct Loose Stone, Japan-Germany Mirror Sale price¥79,800

【Available 9/9 at 10 PM】【Colori】Pt900 Opal 1.10ct Diamond 0.46ct Ring Sale price¥98,000

K18WG オーロラ天女・アコヤ真珠（アコヤパール）ダイヤモンドブローチ真科研鑑

[Available 9/5 at 10 PM] 18K White Gold Aurora Tennyo Akoya Pearl and Diamond Brooch, with Pearl Science Laboratory Certificate Sale price¥98,000

[On Sale 9/14, 10:00 PM] [Colorifi] Pt900 Ruby 0.71ct / Diamond 0.24ct Ring with Appraisal Report Sale price¥98,000

Brazilian Indigolite Tourmaline 1.514ct Loose Stone, Japan-Germany Exchange Sale price¥55,800

[Lottery Sale 0818_07] Madagascar Bi-Color Sapphire 1.870ct Loose Stone with Gem Identification Report Sale price¥79,800

[Lottery Sale 0818_09] Brazilian Dioptase 1.608ct Loose with Certificate Sale price¥59,800

Pt900/Pt850 ピンクトルマリン 1.10ct ダイヤモンド0.02ctペンダント（ネックレス）鑑別書

[22602719 Posted] [Calafuri] Pt900/Pt850 Pink Tourmaline 1.10ct Diamond 0.02ct Pendant (Necklace) with Certificate Sale price¥98,000

Pt900 カラーチェンジサファイア0.446ct ダイヤモンド0.12ctリング鑑別書

[On sale 8/31 at 10 PM] [Colori] Pt900 Color-Change Sapphire 0.446ct Diamond 0.12ct Ring with Identification Report Sale price¥89,800

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.