Oval Cut

Brazilian Indigolite Tourmaline 1.514ct Loose Stone, Japan-Germany Exchange Sale price¥55,800

モザンビーク産ピンクトルマリン 1.634ctルース（CuO:0.1%,MnO:0.1%）

Pink tourmaline from Mozambique 1.634ct loose stone (CuO: 0.1%, MnO: 0.1%) Sale price¥29,800

【8/30 22時販売】ジンバブエ産スフェーン 0.302ctルース Sale price¥8,800

【8/29 22時販売】タンザニア産ミントガーネット 0.296ctルース Sale price¥8,800

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） 0.284ctルース

【#202607 Akihabara Pop-up, Currently Out of Stock】【12563254 Listed】Madagascar Bekily Blue Garnet (Color Change Garnet) 0.284ct Loose Sale price¥59,800

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

Royal blue sapphire 1.220ct loose stone Sale price¥258,000

[Lottery Sale ②_202608_08] Unheated Color Change Sapphire from Sri Lanka 1.140ct Loose Stone GIA Sale price¥258,000

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

Pakistani Clinohumite 1.440ct Loose Stone, Japan-Germany Exchange Sale price¥39,800

【9/1 22時販売】ピジョンブラッドルビー 0.350ctルース AIGS Sale price¥49,800

【9/2 22時販売】ピジョンブラッドルビー 0.325ctルース JTL鑑別書 Sale price¥69,800

[Published 12562277] Brazilian Marcasite in Quartz Loose Stone 4.188ct Sale price¥12,800

[Lottery Sale ②_202608_10] Yellow Sapphire 2.190ct Loose GIT Sale price¥158,000

【Lottery Sale ②_202608_15】Tanzanian Chrome Tourmaline 2.271ct Loose Stone Sale price¥98,000

[Posted 12549460] Star peridot from Myanmar 3.748ct loose Sale price¥19,800

[On Sale August 23rd, 10 PM] Sri Lankan Blue Sapphire 0.286ct Loose Stone with Certificate Sale price¥14,800

[On sale August 25 at 10 PM] Brazilian Limonite in Topaz 5.103 ct Loose Stone Sale price¥12,800

【Sales start: August 22nd, 10 PM JST】Tanzanian Mint Garnet 0.238ct Loose Stone Sale price¥12,800

[On sale 8/22 at 10 PM] Mozambique Ruby 0.409ct Loose Stone (Houseki Kyo) Sale price¥18,800

[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

[On sale August 27, 10 PM JST] Brazilian blue tourmaline, 1.566 ct, loose, with appraisal Sale price¥69,800

【Sales start: August 27, 10 PM JST】Brazilian Imperial Topaz 1.324ct Loose Stone with Identification Report Sale price¥29,800

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

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

[Sale on August 23rd at 10 PM] Old Czechoslovakia Moldavite 2.091ct Loose Stone with Certificate Sale price¥29,800

【Sales start 8/28 10 PM JST】Moldavite Loose Stone 2.265ct from former Czechoslovakia 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 on 8/28 at 10 PM] Nigerian Indicolite Tourmaline 0.242 ct Loose Stone with Certificate Sale price¥22,800

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

[Posted on 12564182] Tanzanian Spinel 1.154ct Loose Gemstone Sale price¥39,800

[Posted 12564181] Tanzanian Spinel 1.117ct Loose Stone Sale price¥39,800

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

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

Lottery Sale ⑧ [For Winners Only] [Listed as 12563226] Kochi Prefecture Boke Coral (Sango) 7.900ct Loose Stone Sale price¥59,800

[Item 12564087] Kochi Prefecture Boke Coral (Sango) 15.237ct Loose Stone Sale price¥69,800

[#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

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

[12564014 listed] Madagascar Royal Blue Sapphire 0.559ct Loose Stone Sale price¥45,800

[#202607 Akihabara Pop-up Store - Currently out on loan] [Listed as 12563392] Tanzanian Red Spinel 0.291ct Loose Stone Sale price¥35,800

[Lottery Sale 0707_06] Kunzite from Afghanistan, 69.722ct Loose Stone Sale price¥258,000

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_11] Burmese Pigeon Blood Ruby 0.450ct Loose AIGS Sale price¥98,000

[#202607 Akihabara Popup Exhibit] [Published in 12563402] Petzottaite, Madagascar, 0.188ct Loose Sale price¥35,800

[#202607AkihabaraPopUpOnLoan][12563137 Listed] Brazilian Santa Maria Aquamarine 0.264ct Loose Stone Sale price¥18,800

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.