Product list

オーストラリア産オーストラリア産レインボーラティスサンストーン 2.208ctルース

[Sale on 7/10 at 10 PM] Australian Rainbow Lattice Sunstone 2.208ct Loose Stone Sale price¥22,800

[On sale July 10th at 10 PM] Brazilian Dumortierite in Quartz 1.684 ct Loose Stone Sale price¥12,800

[On sale July 10 at 10 PM JST] Brazilian Dumortierite in Quartz, 4.152 ct loose stone Sale price¥25,800

[Sales start July 13, 10 PM] Kochi Prefecture red coral 4.485 ct loose stone Sale price¥98,000

[On sale July 10 at 10 PM] Limited 8 stones: Sweet Home Mine rhodochrosite single loose stone (average 0.1 ct) [Multiple purchase discount available] Sale price¥3,980

[Listing No. 12563397] Brazilian Alexandrite 0.217 ct Loose Stone Sale price¥39,800

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

[Published on 22602650] [Colorful] K9 Blue Sapphire Pendant Top (Necklace Top) Sale price¥18,800

[Listed as 22602651] [Colorful] K9 Ruby Pendant Top (Necklace Top) Sale price¥19,800

Pt900 ブルーサファイア 2.67ct・ダイヤモンド0.75ctペンダントトップ（ネックレストップ）鑑別書

[Item 22602648] [Colorflee] Pt900 Blue Sapphire 2.67ct Pendant Top (Necklace Top) Sale price¥228,000

Pt850 ブルーサファイア 0.66ct・ダイヤモンド0.19ctリング鑑別書

[22602646 listed] [Karafuri] Pt850 Blue Sapphire 0.66ct Ring Sale price¥59,800

[Listed as 12563264] Rough Russian Diamond (Sawable) 0.124ct Sale price¥39,800

Sierra Leonean Rough Diamond (Sawable) 0.072 ct. [12563273 Listed] Sale price¥22,800

[12563374 Posted] Bicolor Euclase from Zimbabwe, 0.055ct Loose Stone Sale price¥14,800

[Listing 12563380] Unset 1.077ct Tanzanian Zircon Sale price¥12,800

[Published on 12563384] Tanzanian Zircon 2.053ct Loose Sale price¥19,800

[Posted on 12563395] Tanzanian Pink Spinel 0.148ct Loose Gemstone Sale price¥22,800

[Item 12563407] Afghan Green Hauyne 0.075ct Loose Stone Sale price¥29,800

[Published 12562264] Brazilian Lazulite 0.048ct Loose Sale price¥36,800

[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

Diamond 3.0mm/0.100ct Loose (E, VVS-2, VeryGood) 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

Diamond 0.229ct Loose (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

[On sale July 3 at 10 PM] Brazilian Paraiba Tourmaline 2.9mm/0.090ct Loose Stone (CuO:1.7% MnO:1.4%) 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

[On sale August 7th, 10 PM JST] Brazilian Santa Maria Aquamarine 0.463ct Loose Stone, with appraisal report Sale price¥29,800

0.416ct Loose Mozambique Ruby with Gemstone Identification Report 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

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.