Ha line

Green Fluorite 38.074ct Loose Sale price¥148,000

Brazilian Yellow Beryl 11.411ct Loose Stone, Japan-Germany Exchange Sale price¥25,800

Brazilian Particolor Paraiba Tourmaline 0.490ct Loose (Bicolor Paraiba Tourmaline) GIA Sale price¥398,000

[Lottery Sale 0818_07] Madagascar Bi-Color Sapphire 1.870ct Loose Stone with Gem Identification Report Sale price¥79,800

[8/30 10:00 PM Release] Mexican Fire Opal 0.352ct Loose Stone Sale price¥7,980

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

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

[Published on 12563859] Australian black opal, 1.184ct loose stone Sale price¥45,800

[Listing 12563862] Australian Black Opal 1.392ct Loose Sale price¥69,800

【9/1 10 PM Release】US Peridot 1.280ct Loose Stone Sale price¥18,800

[9/2, 10 PM release] Madagascar Padparadscha Sapphire 0.497ct Loose Stone, DGL Certified Sale price¥69,800

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

[Updated 12546024] Ametrine 4.206ct loose Sale price¥39,800

[Sale starts August 25th at 10 PM JST] Madagascar Pezzottaite 2.7mm/0.062ct Loose Gemstone Sale price¥11,000

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

[Posted as 12563742] Brazilian Bicolor Tourmaline, 1.524 ct loose stone Sale price¥18,800

[Lottery Sale 1_202608_04] Pt900 Benitoite (USA) 0.152ct / Diamond 0.58ct Ring Sale price¥188,000

K18WG パライバトルマリン 0.09ct・ダイヤモンド0.06ctリング（CuO:1.0%、MnO:0.4%）ソーティング（一般社団法人宝石貴金属協会）

[22602666 listed] [Colorful] K18WG Paraiba Tourmaline 0.09ct Ring Sale price¥198,000

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

Brazilian bicolor tourmaline 7.489ct loose Sale price¥39,800

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

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

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

Brazilian Paraiba Tourmaline 0.068ct loose stone Sale price¥61,800

[#202607 Akihabara Pop-up Store Takeout in Progress] [12562065 Posted] Brazilian Sky Blue Topaz 0.906ct Loose Stone Sale price¥12,800

【#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

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

Brazil Color Change Fluorite 1.099ct Loose Stone Sale price¥9,800

Madagascar Padparadscha Sapphire 3.4mm/0.208ct Loose Gem with Central Gem Laboratory Appraisal Sale price¥45,800

Brazilian Golden Beryl 7.2mm/1.369ct Loose Stone with Certificate of Authenticity (Sale begins August 2nd at 10 PM JST) Sale price¥7,980

[Listed as 12563246] Mexican Fire Opal 1.115ct Loose Sale price¥25,800

Brazilian yellow beryl, 1.472 ct loose Sale price¥19,800

Pt950/K18 パライバトルマリン 0.11ct（CuO:2.7%,MnO:3.4%）・ダイヤモンド1.12ctリング　宝貴協

[On sale August 2 at 10 PM] [ColorFuli] Pt950/K18 Paraiba Tourmaline 0.11ct (CuO:2.7%, MnO:3.4%) and Diamond 1.12ct Ring - Houki-kyo Sale price¥188,000

1.082ct Loose Australian Black Opal with Certification Sale price¥69,800

Australian Black Opal 0.778ct Loose Sale price¥35,800

[Sales begin 8/3 at 10 PM JST] Australian Black Opal 0.957ct Loose Stone with Appraisal Sale price¥49,800

[12558084 posted] Benitoite 0.190ct Loose, with identification report, Made in America Benitoite 0.158ct Loose, with identification report Benitoite 0.190ct Loose, with identification report Sale price¥118,000

[Listed 12563403] Petzottaite from Madagascar 0.200ct Loose Sale price¥29,800

Pt900 ブラックオパール 0.58ct ペンダントトップ（ネックレストップ）鑑別書

【Colorfleur】Pt900 Black Opal 0.58ct Pendant Top with Authenticity Card Sale price¥55,800

Pt900 ブラックオパール 0.66ct ペンダントトップ（ネックレストップ）鑑別書

[COLORFUL] Pt900 Black Opal 0.66ct Pendant Top (Necklace Top) with Identification Card Sale price¥55,800

Brazilian Paraiba Tourmaline 2.9mm/0.090ct Loose (CuO:1.7% MnO:1.4%) Sale price¥69,800

Madagascar Padparadscha Sapphire 4.5mm/0.416ct Loose Gemstone, Central Gemology Laboratory certified Sale price¥98,000

Sri Lankan Chrysoberyl Cat's Eye 1.514ct Loose Stone Sale price¥5,980

Sri Lankan Chrysoberyl Cat's Eye 1.074ct Loose Stone Sale price¥4,980

Brazilian Paraiba Tourmaline 0.360ct Loose GIA Sale price¥298,000

Australian black opal 3.242ct loose stone Sale price¥59,800

非加熱ブラジル産パライバトルマリン 0.060ctルース（CuO:1.6%、MnO:2.3%）

Brazilian Paraiba Tourmaline 0.060ct Loose (CuO:1.6%, MnO:2.3%) Sale price¥42,800

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.