Width: 4.1 - 5.0mm

【8/30 22時販売】ダイヤモンド 4.4mm/0.309ctルース(D, VVS-1, 3Excellent) Sale price¥79,800

【8/29 22時販売】マダガスカル産アンダリュサイト 0.454ctルース Sale price¥7,980

【8/29 22時販売】タンザニア産パープルスピネル 0.751ctルース Sale price¥18,800

【8/29 22時販売】ブラジル産ラベンダークォーツ（スコロライト） 0.475ct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

【#202607 Akihabara Pop-up Store - Currently Removed from Stock】【12563063 Listed】Padparadscha Sapphire 0.619ct Loose Stone Sale price¥138,000

[#202607 Akihabara Pop-up Store Carry Out] [32501946 Listed] Diamond 0.380ct Loose (D, VVS2, 3Excellent) GIA Sale price¥110,000

【#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 0.578ct loose stone Sale price¥9,800

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

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

【9/1 22時販売】ブラジル産パライバトルマリンインクォーツ 4.3mm/0.327ctルース Sale price¥18,800

Purple zoisite from Tanzania 1.103ct loose Japanese German edition Sale price¥98,000

[Sale on August 27th at 10 PM] Synthetic Rutile 0.566ct Loose Stone Sale price¥9,800

[On sale August 22nd, 10 PM JST] Brazilian pink tourmaline 4.9mm/0.400ct loose stone, Hōki Kyō Sale price¥15,800

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

[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

[12563388 listed] Dioptase from Brazil, 0.894ct loose stone Sale price¥22,800

[Listed as 12563455] Tanzanian Bi-color Grossular Garnet 0.801 ct Loose Stone Sale price¥19,800

[12563744 listed] Bi-color Tourmaline from Brazil 1.153ct Loose Stone Sale price¥12,800

[Listing 12563877] Afghan Green Hauyne 0.269ct Loose Sale price¥98,000

[Featured on 12563911] Colombian Pyrite and Mica in Emerald, 0.409ct Loose Gemstone Sale price¥32,800

[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

[Sale 8/28 10PM JST] Nigerian Indicolite Tourmaline 4.2mm/0.308ct Loose, with Certificate Sale price¥29,800

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

[Listed as 12563903] Tanzanian Bicolor Zoisite 1.382ct Loose Stone Sale price¥45,800

[Lottery Sale 0812_17] Unheated Burmese Jedi Spinel 0.430ct Loose Gemstone GUILD Sale price¥118,000

Colombian Euclase 0.546ct Loose Stone Sale price¥25,800

[12558559] Zimbabwe bicolor euclase rough stone 0.744ct Sale price¥39,800

[#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

ダイヤモンド 4.45mm/0.324ctルース(D, VVS1, 3Excellent) GIA&中宝

[Lottery Sale 1_202608_11] Diamond 4.45mm/0.324ct Loose (D, VVS1, 3Excellent) GIA & CBT Sale price¥98,000

ダイヤモンド 4.42mm/0.330ctルース(E, VS1, 3Excellent) GIA

【Lottery Sale ①_202608_10】Diamond 4.42mm/0.330ct Loose (E, VS1, 3Excellent) GIA Sale price¥98,000

[Item 12564022] Tanzanian Mint Diopside 0.794ct Loose Stone Sale price¥22,800

Zoisite from Tanzania, 0.643 ct loose Sale price¥18,800

[Published as 12564055] American Red Beryl 0.239ct Loose Stone Sale price¥69,800

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

diamond Sale price¥45,800

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

【Lottery Sale 0428_2_05】American Neptunite 0.859ct Loose Gemstone with Certificate Sale price¥128,000

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

[Lottery Sale 0718_08] Tanzanian Pink Zoisite 0.419ct Loose Stone with Gem Identification Report Sale price¥69,800

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

【Sales start: August 13, 10 PM JST】Loose Zimbabwe Sphene, 0.512 ct, with certificate Sale price¥17,800

[On Sale August 13th at 10 PM] Zimbabwe Sphene 0.499ct Loose Gemstone with Certificate Sale price¥17,800

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.