Vertical: 3.1 - 4.0mm

【8/30 22時販売】マダガスカル産サファリン 0.164ctルース鑑別書 Sale price¥12,800

【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】ブルーサファイア 0.176ctルース Sale price¥14,800

【8/30 22時販売】ブルーサファイア 0.148ctルース Sale price¥8,800

【#202607 Akihabara Pop-up Store - Currently Removed】【Listed as 12563268】Rough Diamond (Sawable) from South Africa 0.271ct Sale price¥88,800

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

Brazilian Euclase 0.213ct loose stone (bicolor Euclase) Sale price¥12,800

[Posted as 12563267] Rough Botswana Diamond (Sawable) 0.140ct Sale price¥44,800

[Listed as 12563354] Jeremejevite from Namibia, 0.103ct Loose Stone Sale price¥25,800

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

[12563370 listed] Eucrite from Zimbabwe 0.083ct Loose Sale price¥18,800

【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

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

Brazilian Alexandrite 0.105ct Loose Stone [Listed under 12563842] Sale price¥29,800

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

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

[Posted on 12563959] Madagascar Padparadscha Sapphire 0.164ct Loose Stone Sale price¥36,800

[Lottery Sale 0707_09] Unheated Burmese Sapphire 0.210ct Loose GIA 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

【#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

[#202607 Akihabara Pop-up Store Takeout in Progress] [12559784 Posted] Hackmanite 0.110ct Loose Stone Sale price¥22,800

[#202607AkihabaraPopUpTakenOut] [12560302Listed] Magnesioaxinite 0.154ct Loose Sale price¥18,800

[Sale on August 13th at 10 PM] Yellow Diamond 3.2mm/0.144ct Loose (FANCY VIVID YELLOW, SI-2) Sale price¥55,800

[On sale August 9 at 10 PM JST] German Hauyne 3.5mm/0.134ct Loose Stone with Certificate Sale price¥29,800

[On Sale August 16th at 10 PM] Lazurite (Lapis Lazuli) from Pakistan, 0.116ct Loose Stone with Certificate Sale price¥24,800

[Listed on 12563962] Madagascar Padparadscha Sapphire 0.314 ct Loose Stone Sale price¥69,800

Afghan Green Hauyne 0.062ct Loose with Certificate Sale price¥16,800

[Listed as 12563891] Namibian Jeremejevite 0.089ct Loose Sale price¥22,800

Brazilian Alexandrite 0.102ct Loose Stone with Certification Sale price¥29,800

[On sale August 2 at 10 PM] Colombian Emerald 0.107 ct Loose Gemstone with Certificate Sale price¥12,800

ダイヤモンド 3.0mm/0.105ctルース(F, VVS2, VeryGood)

Diamond 3.0mm/0.105ct Loose (F, VVS2, VeryGood) Sale price¥19,800

ダイヤモンド（ハート＆キューピッド）3.0mm/0.226ctルース(G, VVS-1, 3Excellent H&C)

Diamond (Hearts & Arrows) 3.0mm/0.226ct Loose (G, VVS-1, 3Excellent H&C) Sale price¥46,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.240ctルース

Nara Prefecture, Tenkawa Village Rainbow Garnet (Andradite Garnet) 3.5mm/0.240ct Loose Sale price¥8,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.336ctルース

Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture, 3.8mm/0.336ct Loose Stone Sale price¥9,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 3.9mm/0.378ctルース（ローズカット）

Andradite Garnet (Rainbow Garnet) from Tenkawa Village, Nara Prefecture, 3.9mm/0.378ct loose stone (rose cut) Sale price¥9,800

0.319 ct Tanzanian bicolor grossular garnet loose stone Sale price¥19,800

Madagascar Padparadscha Sapphire 3.4mm/0.208ct Loose Gem with Central Gem Laboratory Appraisal Sale price¥45,800

Madagascar Paparadscha Sapphire 3.5mm/0.234ct Loose Stone, Central Gem Lab certified Sale price¥49,800

[On sale August 11th, 10 PM] Sweet Home Mine Rhodochrosite 0.104ct Loose Stone with Certificate Sale price¥8,800

[Listed as 12563371] Zimbabwe Euclase 0.087ct Loose Gemstone Sale price¥19,800

Jeremejevite from Namibia, 0.140ct Loose Stone, with Certificate Sale price¥33,800

カメレオンダイヤモンド 4.0mm/0.255ctルース(LIGHT GRAYISH GREEN YELLOW, VS2)

[For xxx only] Chameleon Diamond 0.255ct Loose (LIGHT GRAYISH GREEN YELLOW, VS2) (Listed under 32501581) Sale price¥59,800

ダイヤモンド 3.7mm/0.185ctルース(D, VVS-2, 3Excellent H&C)

Diamond 3.7mm/0.185ct Loose (D, VVS-2, 3Excellent H&C) Sale price¥39,800

0.229 ct Loose Red Spinel from Myanmar with Certificate Sale price¥45,800

[Posted on 12563395] Tanzanian Pink Spinel 0.148ct Loose Gemstone Sale price¥22,800

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.