5 major gems

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 as 12563996] Australian Black Opal 1.029ct Loose Stone Sale price¥29,800

コロンビア産パイライト・雲母インエメラルド 5.0mm/0.500ctルース鑑別書

[12563912 listed] Colombian Pyrite and Mica in Emerald 0.500ct Loose Stone Sale price¥39,800

Loose White Diamond 0.108ct (FANCY WHITE, I-1) Sale price¥55,800

diamond Sale price¥45,800

[Lottery Sale 0707_09] Unheated Burmese Sapphire 0.210ct Loose GIA Sale price¥69,800

【Lottery Sale 0731_08】Brazilian Emerald Cat's Eye 6.083ct Loose Gemstone with Japanese and German Gemological Report Sale price¥258,000

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 0731_09] Burmese Ruby 1.020ct Loose Stone GIA Sale price¥188,000

Pt900 カンボジア産ラタナキリブルージルコン 2.22ct・ダイヤモンド0.38ctリング中宝ソ

[Lottery Sale 0725_14] Pt900 Cambodian Blue Zircon (Ratanakiri Blue) 2.22ct Ring with GIA Report Sale price¥158,000

[Lottery Sale 0725_10] Unheated Mozambique Pigeon Blood Ruby 0.430ct Loose Gemstone AIGS Sale price¥98,000

【#202607 Akihabara Pop-up Store - Currently Out of Stock】【Colorful】Pt900 Diamond 1.00ct Ring Sale price¥98,000

【#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

[#202607 Akihabara Pop-up Store - Currently out on display] [Listed under item 12562542] Australian Black Opal 0.530ct Loose Stone Sale price¥14,800

【#202607 Akihabara Pop-up Store - Currently at Offsite Location】【Shinjuku Marui Annex 202605 Offsite Location】Lottery Sale 11【For Winners Only】【Published on 12559975】Colombian Non-Oil Emerald 1.760ct Loose GIA Sale price¥1,580,000

[#202607 Akihabara Pop-up currently out of office] [Sale starts August 19th, 10 PM JST] Slice Trapiche Diamond 0.228ct Loose Sale price¥18,800

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

[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, 10 PM] Australian Opal 0.674ct Loose Stone with Certificate Sale price¥8,800

【#202607 Akihabara Pop-up Store Carry-out】【12562676 Listed】Sri Lankan Blue Sapphire 0.501ct Loose Stone Sale price¥29,800

[#202607AkihabaraPopUpTakeout][12562677Listed] Sri Lankan Blue Sapphire 0.513ct Loose Sale price¥22,800

[On sale August 19th at 10 PM] Colombian Pyrite and Mica in Emerald 5.5mm/0.617ct Loose Stone with Certification Sale price¥45,800

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

Pt900 ビルマ産ルビー 1.07ct・ダイヤモンド0.32ctリング GIA

[22602674 Listed] [Karafuri] Pt900 Burma Ruby 1.07ct Ring Sale price¥258,000

[On Sale August 6, 10 PM] [Colori] K18 Blue Sapphire 1.13ct / Diamond 0.75ct Ring with Appraisal Report Sale price¥188,000

Colombian Pyrite, Mica in Emerald 1.192ct Loose Stone with Certificate Sale price¥79,800

コロンビア産パイライト・雲母インエメラルド 4.8mm/0.360ctルース鑑別書

[Sale on 8/6 at 10 PM JST] Colombian Pyrite and Mica in Emerald, 4.8mm/0.360ct, Loose Stone with Certificate Sale price¥29,800

[On sale August 1, 10 PM] Colombian Cosquez Trapiche Emerald 0.252ct Loose Stone with Certificate Sale price¥35,800

[On sale August 1, 10 PM JST] Colombian Cosquez Trapiche Emerald, 0.231 ct, Loose Stone with Certificate Sale price¥33,800

[On sale August 14th at 10 PM] Colombian Cosquez Trapiche Emerald, 0.199ct Loose Stone with Appraisal Sale price¥29,800

[Sales start August 2nd at 10 PM] Madagascar blue sapphire 0.662 ct loose gemstone with a certificate Sale price¥18,800

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

1.025ct Loose White Sapphire from Sri Lanka with Gemological Report Sale price¥35,800

Pt900 アコヤ真珠（アコヤパール）10.2mm・ダイヤモンド0.23ctリング鑑別書

[Published in 22602657] [Colorful] Pt900 Akoya Pearl Ring Sale price¥98,000

Nepalese Kyanite 2.461ct Loose Stone Sale price¥12,800

Pt900 インペリアルトパーズ 3.88ct・ダイヤモンド0.26ct リング鑑別書

【Karahuri】Pt900 Imperial Topaz 3.88ct / Diamond 0.26ct Ring with Certificate Sale price¥258,000

ピンクダイヤモンド 2.2mm/0.044ctルース(FANCY LIGHT PURPLE PINK, SI1)

Pink Diamond 2.2mm/0.044ct Loose Stone (FANCY LIGHT PURPLE PINK, SI-1) Sale price¥39,800

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

Diamond 3.0mm / 0.105ct Loose (F, VVS-2, Very Good) Sale price¥19,800

ピンクダイヤモンド 0.073ctルース(FANCY LIGHT PURPLE PINK, SI2)

Pink Diamond 0.073ct Loose (FANCY LIGHT PURPLE PINK, SI-2) Sale price¥39,800

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

Pt900/Pt850 ダイヤモンド 4.0mm/0.29ct 一粒ペンダント（ネックレス）

[COLORFUL] Pt900/Pt850 Diamond 4.0mm/0.29ct Solitaire Pendant (Necklace) Sale price¥35,800

Pt850/K14WG アップルグリーンダイヤモンド0.38ct・ダイヤモンド0.50ct ピアス鑑別書

[COLORFUL] Pt850/K14WG Apple Green Diamond 0.38ct Diamond 0.50ct Earrings with Certificate of Appraisal Sale price¥98,000

[Karafuru] Pt900 Ruby 0.69ct, Diamond 0.16ct Ring with Appraisal Report Sale price¥188,000

0.184ct Trapiche Emerald Loose from Cosquez, Colombia, with Appraisal Report Sale price¥25,800

Colombian Trapiche Emerald (from Cosquez) 0.157ct Loose Stone with Certificate Sale price¥22,800

Columbia Cosquez Mine Trapiche Emerald 0.144ct Loose with Identification Report Sale price¥22,800

Colombia Cosquez Mine Trapiche Emerald 0.138ct Loose with Certificate Sale price¥19,800

Colombia Emerald 4.5mm/0.286ct Loose Stone (Hokikyō) Sale price¥69,800

Colombia Emerald Cat's Eye 0.060ct Loose, Hōki Kyō Sale price¥15,800

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.