0.1 ct - 2.0 ct

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[On sale 8/24 22:00] Sri Lankan Black Moonstone 0.636ct Loose Stone

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[On sale August 25th at 10 PM] Brazilian Lavender Quartz (Scolite) 0.918ct Loose Gemstone

coming soon

[Lottery Sale] Indian Orissa Alexandrite 0.360ct Loose GIA Sale price¥98,000

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Madagascar Bi-Color Sapphire 1.665ct Loose Gemstone

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[Listed as 12563196] Imperial Topaz from Brazil, 1.036ct Loose Gemstone

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Brazilian Sky Blue Topaz 0.898 ct Loose Gemstone

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[On sale August 28th, 10 PM] Cambodian Blue Zircon (Ratanakiri Blue) 0.419ct Loose Stone with Appraisal

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[On sale August 28th at 10 PM] Nigerian Indicolite Tourmaline 0.341ct Loose Gemstone with Certificate

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[Sale 8/28 10PM JST] Nigerian Indicolite Tourmaline 4.2mm/0.308ct Loose, with Certificate

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[Sales Start: August 27, 10 PM JST] 0.523ct Tanzanian Violet Sapphire Loose Gemstone (Color Change Sapphire) with Certification

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[Sales start August 27, 10 PM JST] Tanzanian Sapphire 0.622 ct Loose (Color Change Sapphire) with Appraisal Report

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Kashmir unheated sapphire 0.350ct loose stone GIA

coming soon

【12564184掲載】東アフリカ産非加熱バイカラーサファイア 0.510ctルース

【Lottery Sale 0824】Unheated Bi-Color Sapphire from East Africa 0.510ct Loose Stone Sale price¥98,000

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Madagascar Sapphire 1.480ct Loose Stone GIA

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Bolivian phosphophyllite 0.137ct loose stone with identification report

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0.546ct Loose Musgravite from Myanmar, with JGL Report

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Tanzanite Wurtzite 0.567ct Loose Stone, GGL Certified

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【Listed on 12564012】Madagascar Orange Sapphire 0.671ct Loose

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[Posted as 12563738] Brazilian Green Tourmaline 1.940ct Loose Stone

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Congo Carolite 6.2mm/1.481ct Loose Stone Japan-Germany Scale

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ブラジル産非加熱インペリアルトパーズ（シェリーカラー） 1.042ctルース鑑別書

[Listing 12564053] Brazilian Imperial Topaz 1.042ct Loose Stone

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[Listed as 12564067] Brazilian Spessartine Garnet 0.923ct Loose Stone

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[12564014 listed] Madagascar Royal Blue Sapphire 0.559ct Loose Stone

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[Posted on 12563959] Madagascar Padparadscha Sapphire 0.164ct Loose Stone

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【#202607 Akihabara Pop-up Store - Currently Removed for Display】Lottery Sale: Brazilian Microlite Loose Stone, 0.138ct

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[Lottery Sale 0731_07] Unheated Montana Sapphire (Yogo Mine) 0.186ct Loose Stone with Japan-Germany Gemological Analysis Report

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US Benitoite 0.148ct Loose Stone (Emerald Cut) with Gem Identification Report

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[Lottery Sale 0725_11] Burmese Pigeon Blood Ruby 0.450ct Loose AIGS

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[Lottery Sale 0718_11] Pink Grossular Garnet from Myanmar, 0.558 ct. Loose Stone, JGGL certified

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【#202607 Akihabara Pop-up, Currently Out of Stock】【12563269 Posted】Rough Diamond (Sawable) from South Africa 0.280ct

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[#202607 Akihabara Popup Exhibit] [Published in 12563402] Petzottaite, Madagascar, 0.188ct Loose

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[#202607AkihabaraPopUpTakeOut][12563062Published] Padparadscha Sapphire 0.690ct Loose Stone

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#202607 Akihabara Pop-up Store (currently out of office) #12563139 Listed: Brazilian Santa Maria Aquamarine, 0.339ct Loose Stone

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[#202607 Akihabara Pop-up Store - Currently Removed] [12559462 Listed] Nigerian Mandarin Garnet 1.347ct Loose Gemstone

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[#202607 Akihabara Pop-up Store Takeout in Progress] [12559784 Posted] Hackmanite 0.110ct Loose Stone

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[#202607 Akihabara Pop-up Store Carry Out] [12559782 Listed] Hackmanite 0.142ct Loose

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【#202607 Akihabara Pop-up Items Out for Display】【12555648 Posted】Ludwigite in Peridot from Pakistan 1.624ct Loose

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【スターインカット】メキシコ産ファイアオパール 7mm/0.678ctルースワッペン付

[Star in cut] Mexican fire opal 7mm/0.678ct loose patch

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[On Sale August 13 at 10 PM] 0.669ct Loose Sphene from Zimbabwe with Certificate

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[On Sale August 13th at 10 PM] Zimbabwe Sphene 0.499ct Loose Gemstone with Certificate

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Sphene from Brazil (Fana-ginho), 0.476 ct, with laboratory report

coming soon

【12564047掲載】ブラジル産サンタマリアアクアマリン 1.128ctルース

[Lottery Sale 0812_14] Brazilian Santa Maria Aquamarine 1.128ct Loose Stone with Japan-Germany Gemological Report (Origin Stated) Sale price¥79,800

coming soon

[Deadline 8/29 | Lottery Sale] Brazilian Santa Maria Aquamarine 1.467ct Loose Gemstone with NGL Certificate Sale price¥59,800

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【ダンデライオンカット】タンザニア産ブルースピネル 6.0mm/0.953ctルース鑑別書鑑定士が運営しています。

[Dandelion Cut] Tanzanian Blue Spinel 6.0mm/0.953ct Loose Stone with Certificate

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[Listed in 12563739] Green Tourmaline Loose Stone from Brazil 0.906ct

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[On sale August 2nd at 10 PM] Colombian pyrite and mica-in-emerald 0.271ct loose stone with gemological report

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Brazilian Dendritic Apatite 1.063ct Loose Gemstone with Japan-Germany certification

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0.566ct Loose Blue Sapphire from Sri Lanka, with Japan-Germany appraisal

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.