Width: 3.1 - 4.0mm

【8/30 22時販売】イエローダイヤモンド 4.0mm/0.270ctルース(UNDER N(VERY LIGHT YELLOW), SI-2) Sale price¥29,800

【8/30 22時販売】ジンバブエ産スフェーン 0.302ctルース Sale price¥8,800

【8/30 22時販売】コロンビア産ミントカラーエメラルド 0.359ctルース Sale price¥12,800

【8/30 22時販売】ジンバブエ産スフェーン 0.332ctルース Sale price¥9,800

【8/29 22時販売】タンザニア産ミントガーネット 0.296ctルース Sale price¥8,800

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.284ctルース

【#202607 Akihabara Pop-up, Currently Out of Stock】【12563254 Listed】Madagascar Bekily Blue Garnet (Color Change Garnet) 0.284ct Loose Sale price¥59,800

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） 0.116ctルース

【#202607 Akihabara Pop-up Store - Currently Displayed Off-site】【Listed as 12563184】Madagascar Andesine-Labradorite (Common Name: Rainbow Moonstone) 0.116ct Loose Gemstone Sale price¥14,800

[#202607AkihabaraPop-upExhibition][12563418Posted] Burmese Ruby 0.303ct Loose Sale price¥9,800

Grandidierite from Madagascar 0.264ct loose stone Sale price¥79,800

【9/1 22時販売】タンザニア産ツァボライト 0.366ctルース Sale price¥13,800

【9/1 22時販売】アフガニスタン産ミントカラートルマリン 0.290ctルース Sale price¥14,800

【9/1 22時販売】ピジョンブラッドルビー 0.350ctルース AIGS Sale price¥49,800

【8/31 22時販売】パキスタン産アキシナイト（ブルーティント） 0.263ctルース Sale price¥18,800

[Featured in 12563725] Sri Lankan Pink Sapphire 0.319ct Loose Sale price¥29,800

[On Sale August 23rd, 10 PM] Sri Lankan Blue Sapphire 0.286ct Loose Stone with Certificate Sale price¥14,800

【Sale starts 8/25 10 PM JST】Synthetic Rutile 0.344ct Loose Gemstone Sale price¥8,800

[On sale August 25th at 10 PM] Ruby loose stone, 0.268ct Sale price¥15,800

[On sale August 27th at 10 PM JST] Russian Demantoid Garnet (Horsetail inclusion visible) 3.8mm/0.280ct Loose Sale price¥59,800

【Sales start: August 22nd, 10 PM JST】Tanzanian Mint Garnet 0.238ct Loose Stone Sale price¥12,800

[On sale 8/22 at 10 PM] Mozambique Ruby 0.409ct Loose Stone (Houseki Kyo) Sale price¥18,800

[On sale August 22, 10 PM] Bi-Color Grossular Garnet from Kenya 0.278ct Loose Sale price¥12,800

【Listed as 12562263】Brazilian Santa Maria Aquamarine 0.348ct Loose Gemstone Sale price¥12,800

[Listed as 12563271] Rough Diamond (Sawable) from South Africa, 0.353 ct Sale price¥128,000

【12563732 Posted】Tanzanian Red Spinel 0.177ct Loose Sale price¥35,800

[On sale August 28th, 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 0.515ct Loose Gemstone with Certificate Sale price¥14,800

[Sale begins 8/28 at 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 0.431ct Loose Stone with Certification Sale price¥12,800

[Sale on 8/28 at 10 PM] Nigerian Indicolite Tourmaline 0.242 ct Loose Stone with Certificate Sale price¥22,800

[Listing #12563493] Sri Lankan Blue Sapphire 0.434ct Loose Gemstone Sale price¥22,800

[Listed as 12563733] Tanzania Red Spinel 0.241ct Loose Stone Sale price¥43,800

[Posted 12563878] Green Hauyne from Afghanistan, 0.222 ct Loose Stone Sale price¥79,800

Brazilian Euclase (Bicolor Euclase) 0.302ct Loose Stone Sale price¥45,800

インターナリーフローレスダイヤモンド 0.300ctルース(D, IF) GIA

[Lottery Sale ①_202608_12] Internally Flawless Diamond 0.300 ct Loose (D, IF) GIA Sale price¥118,000

カメレオンダイヤモンド 0.212ctルース(LIGHT BROWNISH GREENISH YELLOW（カメレオン）, SI-1)

[Published on 32501973] Chameleon Diamond 0.212ct Loose (LIGHT BROWNISH GREENISH YELLOW (Chameleon), SI-1) Sale price¥64,800

オレンジダイヤモンド 0.348ctルース(FANCY VIVID YELLOW ORANGE, VS-1)

[Featured in 32501971] Orange Diamond 0.348ct Loose Stone (FANCY VIVID YELLOW ORANGE, VS-1) Sale price¥128,000

イエローダイヤモンド 0.144ctルース(FANCY VIVID YELLOW, SI-2)

Yellow Diamond 0.144ct Loose (FANCY VIVID YELLOW, SI-2) [Listed as 32501969] Sale price¥55,800

[Listed as 12564020] Hackmanite 0.300ct Loose Stone Sale price¥59,800

[#202607 Akihabara Pop-up Store - Currently Displayed] [12563067 Listed] Padparadscha Sapphire 0.649ct Loose Stone Sale price¥128,000

インターナリーフローレスダイヤモンド（H&C） 3.9mm/0.215ctルース(E, IF, 3Excellent H&C) GIA

[Lottery Sale ①_202608_09] Internally Flawless Diamond (H&C) 3.9mm/0.215ct Loose (E, IF, 3Excellent H&C) GIA Sale price¥75,800

[12564014 listed] Madagascar Royal Blue Sapphire 0.559ct Loose Stone Sale price¥45,800

【#202607 Akihabara Popup Outtake】【12562793 Listed】Unheated Brazilian Imperial Topaz (Sherry Color) 0.459ct Loose Stone Sale price¥32,800

[#202607 Akihabara Pop-up Store - Currently out on loan] [Listed as 12563392] Tanzanian Red Spinel 0.291ct Loose Stone Sale price¥35,800

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.459ctルース

[Lottery Sale 0707_08] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.459ct Loose Stone with Certificate Sale price¥69,800

インターナリーフローレスダイヤモンド（H&C） 3.8mm/0.206ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0731_12] Internally Flawless Diamond (H&C) 0.206ct Loose (D, IF, 3Excellent H&C) Sale price¥89,800

[Lottery Sale 0628_05] American Neptunite 0.374ct Loose Stone with Gemstone Identification Report Sale price¥79,800

[Lottery Sale 0725_11] Burmese Pigeon Blood Ruby 0.450ct Loose AIGS Sale price¥98,000

【#202607 Akihabara Pop-up Store - Currently out for display】【12563131 Posted】Brazilian Santa Maria Aquamarine 0.299ct Loose Stone Sale price¥19,800

[#202607 Akihabara Popup Exhibit] [Published in 12563402] Petzottaite, Madagascar, 0.188ct Loose Sale price¥35,800

[#202607AkihabaraPopUpOnLoan][12563137 Listed] Brazilian Santa Maria Aquamarine 0.264ct Loose Stone Sale price¥18,800

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.