New stock

[Lottery Sale_0612_09] Yellow Sapphire 2.150ct Loose Gemstone GIT Sale price¥158,000

[Listed as 12562693] Malawi Bicolor Zircon 1.434ct Loose Sale price¥79,800

[Lottery Sale 0428_2_07] Watermelon Tourmaline 14.780ct Loose Stone Sale price¥128,000

[Lottery Sale_0612_01] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.542ct Loose Sale price¥55,800

[#202607 Akihabara Pop-up Store Carry Out] [On Sale July 4th, 10 PM] Diamond 3.0mm/0.100ct Loose Stone (E, VVS-2, Very Good) Sale price¥22,800

[On Sale July 4th at 10 PM] Diamond 3.8mm/ 0.198ct Loose Stone (D, VVS-2, Very Good) Sale price¥29,800

グリーンダイヤモンド 0.100ctルース(VERY LIGHT GREEN, SI-1)

[On sale July 4th at 10 PM] Green Diamond 0.100ct Loose Stone (VERY LIGHT GREEN, SI-1, Old Cut) Sale price¥39,800

[#202607AkihabaraPopUpItemInTransit] [On Sale July 4th, 10 PM JST] Diamond 0.229ct Loose Stone (D, VS2, Flanders Cut) Sale price¥39,800

Pt900 ダイヤモンド原石 2.733ct・ダイヤモンド0.68ctリング鑑別書

[On sale July 13th, 10 PM JST] [COLORFULI] Pt900 Rough Diamond 2.733ct / Diamond 0.68ct Ring with Appraisal Card Sale price¥198,000

[On sale July 13th at 10 PM] [Colorful] K18 Slice Diamond and Yellow Sapphire Earrings with Certificate Sale price¥55,800

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

[On sale July 11th, 10 PM JST] [Colorfrui] Pt900 Black Opal 0.58ct Pendant Top (Necklace Top) with Identification 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

[On Sale July 11th at 10 PM] [Colorfri] Pt900 Black Opal 0.66ct Pendant Top (Necklace Top) with Identification Card Sale price¥55,800

[On Sale July 9, 10 PM JST] Bicolor Grossular Garnet from Tanzania 0.839ct Loose Stone Sale price¥19,800

[On sale July 3 at 10 PM] Tanzanian Bi-Color Grossular Garnet 0.934ct Loose Stone Sale price¥24,800

【Sale starts 10 PM on July 3rd】Tanzanian Bicolor Grossular Garnet 0.779 ct Loose Stone Sale price¥19,800

【Sales start at 10 PM on July 3rd (JST)】Bicolor Grossular Garnet from Tanzania 0.602ct Loose Gemstone Sale price¥16,800

[On sale July 9th at 10 PM JST] Tanzanian Bicolor Grossular Garnet 0.787ct Loose Stone Sale price¥19,800

[On sale July 15, 10 PM JST] Tanzanian Bi-Color Grossular Garnet, 0.882ct Loose Stone Sale price¥22,800

[On sale July 6th at 10 PM JST] 0.544ct Tanzanian Bi-Color Grossular Garnet Loose Gemstone Sale price¥14,800

【Sales start 10 PM on July 22nd (JST)】Tanzanian Bi-Color Grossular Garnet 0.855ct Loose Stone Sale price¥18,800

【Sales start 10 PM JST on July 6】Tanzanian Bi-Color Grossular Garnet 0.586ct Loose Gemstone Sale price¥14,800

Paraiba tourmaline from Brazil 0.090ct loose Sale price¥69,800

Paraiba tourmaline from Brazil 0.086ct loose Sale price¥79,800

[On sale July 3 at 10 PM] Jeremejevite from Namibia, 0.103 ct loose stone, with certificate Sale price¥25,800

[On sale July 3 at 10 PM] Jeremejevite from Namibia, 0.218ct loose stone, with a certificate of authenticity Sale price¥49,800

[#202607AkihabaraPopUpOnLoan] Santa Maria Aquamarine 0.463ct Loose Stone Sale price¥29,800

[#202607AkihabaraPopUpExhibition][Sale on July 4th at 10 PM] Mozambique Ruby 0.416ct Loose Stone with Certificate Sale price¥29,800

[On sale July 4th at 10 PM] Brazilian Dumortierite in Quartz, 1.290ct Loose Stone Sale price¥12,800

[On sale July 5th, 10 PM JST] Brazilian Blue Tourmaline in Quartz 10.466ct Loose Stone Sale price¥39,800

[On Sale July 6, 10 PM] Brazilian Blue Tourmaline in Quartz 4.241ct Loose Stone Sale price¥19,800

[On sale July 9th at 10 PM JST] Brazilian Black Garden Quartz Loose Stone 5.030ct Sale price¥12,800

ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 4.823ctルース

[#202607AkihabaraPopUpItem][On Sale July 9th, 10 PM JST] Brazilian Tinkerbell Quartz (Pink Fire Quartz) 11mm/4.823ct Loose Stone Sale price¥25,800

[On sale July 24 at 10 PM JST] Brazilian Dumortierite in Quartz 7.3mm/1.729ct Loose Stone Sale price¥12,800

[On sale July 12th at 10 PM] Synthetic Rutile 4.3mm/0.447ct Loose Gemstone Sale price¥12,800

[#202607 Akihabara Pop-up Store Carry Out] [On sale July 5th at 10 PM] Sri Lankan Blue Sapphire 0.550ct Loose Stone with Appraisal Sale price¥39,800

[Sale starts July 6th at 10 PM] Sri Lankan Blue Sapphire 4.0mm/0.269ct Loose Stone with Appraisal Sale price¥29,800

[On sale July 5, 10 PM] Sri Lankan orange sapphire 0.654ct loose stone with gemological report Sale price¥29,800

[On sale July 6th at 10 PM] Sri Lankan Yellow Sapphire 0.815ct Loose Stone with Certification Sale price¥15,800

[On Sale July 5 at 10 PM JST] Madagascar Grandidierite 2.5mm/0.065ct Loose Stone with Certification Sale price¥15,800

[#202607 Akihabara Pop-up Store - Currently out for display] [Available for purchase July 9th at 10 PM] Tanzanian Winza Sapphire (Purple Sapphire) 0.393ct Loose Stone with Certificate Sale price¥18,800

[#202607 Akihabara Pop-up Store Carry-out in progress] [On sale July 5th at 10 PM] Mahenge Spinel (Pink Spinel) from Tanzania 0.566ct Loose Stone with Certificate Sale price¥55,800

[On Sale July 10 at 10 PM JST] Tanzanian Mahenge Spinel (Pink Spinel) 0.333ct Loose Stone with Gemological Report Sale price¥29,800

[On sale July 5th at 10 PM] Colombian Emerald 0.147ct Loose Stone with Appraisal Sale price¥12,800

[On sale July 5th at 10 PM] Colombian Emerald 3.3mm/0.167ct Loose Gemstone with Certificate Sale price¥24,800

[On Sale July 5th at 10 PM] Colombian Emerald 3.3mm/0.158ct Loose Stone with Appraisal Sale price¥18,800

【#202607AkihabaraPopUpTakenOut】【On Sale July 5th, 10 PM】Madagascar Paparadscha Sapphire 3.3mm/0.156ct Loose Stone with Central Gem Lab Certificate Sale price¥29,800

#202607 Akihabara Pop-up Store (Removed for display) [Sales begin July 5th at 10 PM] Madagascar Paparadscha Sapphire 4.5mm/0.416ct Loose Stone with GIA Report Sale price¥98,000

Pomme Blanche "Semi-custom ring setting" Sale priceFrom ¥105,800

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.