Vertical: 5.1 - 6.0mm

【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】メキシコ産ファイアオパール 0.352ctルース Sale price¥7,980

[#202607 Akihabara Pop-up Store - Currently Removed from Stock] [Listed as 12555668] Cambodian Colorless Zircon 0.929ct Loose Stone Sale price¥9,800

Pakistani Peridot 5.2mm/0.562ct Loose Stone Sale price¥9,800

【#202607 Akihabara Pop-up, Currently Out of Office】【12563057 Listed】Sri Lankan Royal Blue Sapphire 1.060ct Loose Stone Sale price¥188,000

Synthetic Alexandrite 0.841ct loose stone Sale price¥15,800

【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

【Sales start 8/24 10 PM JST】Brazilian Strawberry Quartz 5.9mm/0.830ct Loose Stone Sale price¥6,980

【Sales start 8/22 10 PM JST】Bicolor Grossular Garnet from Kenya 0.906ct Loose Stone Sale price¥39,800

[On sale August 23rd at 10 PM] US Oregon Sunstone 6.0mm/ 0.729ct Loose Sale price¥18,800

[On sale August 27th at 10 PM] Sri Lankan green sapphire 0.354ct loose stone with certificate Sale price¥12,800

[On sale August 27th at 10 PM] Tanzanian spinel, 0.644ct loose stone (with needle inclusions) with a gemological report Sale price¥19,800

[On sale August 27 at 10 PM] Tanzanian Spinel 0.536ct Loose (with needle inclusions) - with appraisal report Sale price¥15,800

Zimbabwe Euclase 0.134ct Loose Sale price¥25,800

[On sale 8/23 10 PM JST] Brazilian Apatite Cat's Eye from Rio Grande do Norte, 5.0mm/0.740ct Loose Stone with Certificate Sale price¥14,800

[On sale August 28th at 10 PM] Nigerian Indicolite Tourmaline 0.341ct Loose Gemstone with Certificate Sale price¥29,800

[On sale August 28, 10 PM] Nigerian Indicolite Tourmaline 0.340ct Loose Stone with Certificate Sale price¥29,800

[Listed as 12563729] Brazilian Indicolite Tourmaline 0.389ct Loose Sale price¥38,800

[Listed as 12563918] Sri Lankan Purple Sapphire 0.730ct Loose Stone Sale price¥55,800

[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

American Herkimer Diamond (Rock Crystal) 5.5mm/0.534ct Loose Sale price¥8,800

American Herkimer Diamond (Rock Crystal) 5.3mm/0.594ct Loose Sale price¥7,980

コロンビア産パイライト・雲母インエメラルド 5.5mm/0.614ctルース鑑別書

[Published on 12563914] Loose Colombian Pyrite and Mica in Emerald, 0.614 ct Sale price¥45,800

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

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

[#202607 Akihabara Pop-up Store - Currently Removed from Stock] [12563475 Posted] Mahenge Spinel (Pink Spinel) from Tanzania 0.492ct Loose Stone Sale price¥49,800

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

[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

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

[Lottery Sale 0725_03] Tanzania Purple Spinel 0.427ct Loose Stone with Certificate Sale price¥29,800

[On sale August 9, 10 PM] Untreated Purple-Pink Imperial Topaz, 0.250 ct Loose Stone, with Certificate, from Brazil Sale price¥39,800

[On sale August 19th, 10 PM JST] Untreated Purple-Pink Imperial Topaz from Brazil, 0.241ct loose stone with gemological report Sale price¥35,800

[On Sale August 19, 10 PM] Brazilian Spessartine Garnet 0.968 ct Loose Stone with Certificate Sale price¥25,800

[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

Mozambique Ruby 0.544ct Loose Stone with Certificate of Authenticity Sale price¥39,800

Myanmar Color Change Zircon 5.3mm/1.043ct Loose Stone Sale price¥69,800

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

[On sale 8/14 at 10 PM] US Sweet Home Mine Rhodochrosite 0.179ct Loose Stone with Certificate Sale price¥14,800

[Listed as 12563489] Sri Lankan Blue Sapphire 0.636 ct Loose Stone Sale price¥39,800

[Listed as 12563731] Brazilian Indicolite Tourmaline 0.404 ct Loose Stone Sale price¥39,800

Jeremejevite 0.226ct Loose Sale price¥45,800

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） 0.650ctルース

Rainbow Garnet (Andradite Garnet) 0.650ct Loose Stone from Tenkawa Village, Nara Prefecture Sale price¥16,800

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.