Login

New stock

Sort by
コロンビア産パイライト・雲母インエメラルド 0.901ctルース

Colombian pyrite-mica emerald 0.901ct loose stone Sale price¥45,800
コロンビア産パイライト・雲母インエメラルド 0.983ctルース

Colombian pyrite-mica emerald 0.983ct loose stone Sale price¥49,800
コロンビア産エメラルド 1.707ct原石

Colombian emerald rough stone 1.707ct Sale price¥18,800
ブラジル産ルベライト 1.027ctルース

Brazilian Rubellite 1.027ct Loose Stone Sale price¥69,800
ブラジル産パライバトルマリン 0.047ctルース

Paraiba tourmaline from Brazil 0.047ct loose Sale price¥29,800
ブラジル産パライバトルマリン 0.068ctルース

Brazilian Paraiba Tourmaline 0.068ct loose stone Sale price¥39,800
ブラジル産パライバトルマリン 0.071ctルース

Paraiba tourmaline from Brazil 0.071ct loose Sale price¥39,800
ブラジル産パライバトルマリン 0.052ctルース

Paraiba tourmaline from Brazil 0.052ct loose Sale price¥29,800
ブラジル産パライバトルマリン 0.051ctルース

Paraiba tourmaline from Brazil 0.051ct loose Sale price¥29,800
ブラジル産パライバトルマリン 0.048ctルース

Paraiba tourmaline from Brazil 0.048ct loose Sale price¥29,800
ブラジル産パライバトルマリン 0.120ct《エイトリータ》ルース（CuO:2.0%、MnO:0.7%）

Brazilian Paraiba Tourmaline 0.120ct "Eitrea" loose stone (CuO: 2.0%, MnO: 0.7%) Sale price¥128,000
ブラジル産パライバトルマリン 0.230ctルース GIA（CuO:0.9%、MnO:1.1%)

Brazilian Paraiba Tourmaline 0.230ct Loose GIA (CuO: 0.9%, MnO: 1.1%) Sale price¥158,000
ナイジェリア産コバルトガーナイト 0.284ctルース

Nigerian Cobalt Garnite 0.284ct Loose Stone JTL Catalog Sale price¥39,800
ブルガリア産グリーンスファレライト 0.403ctルース

Bulgarian Green Sphalerite 0.403ct Loose Stone Sale price¥69,800
Benitoite 13 stone half eternity ring set (1.8mm, gradient set)

Benitoite 13 stone half eternity ring set (1.8mm, gradient set) Sale price¥158,000
[Available from 10 PM on August 11th] Gemstone Encyclopedia Playing Cards + 4 Gemstones in a Gemstone Lucky Bag (Valued at 10,000 yen)

[Available from 10 PM on August 11th] Gemstone Encyclopedia Playing Cards + 4 Gemstones in a Gemstone Lucky Bag (Valued at 10,000 yen) Sale price¥6,000
K18 Indian Iolite Sunstone 0.73ct Tanzanite Ring

K18 Indian Iolite Sunstone 0.73ct Tanzanite Ring Sale price¥188,000
K18/Pt950 カンボジア産ブルージルコン0.48ct・パライバトルマリンリング

K18/Pt950 Cambodian Blue Zircon 0.48ct Paraiba Tourmaline Ring Sale price¥89,800
【12548737掲載】タンザニア産コーネルピン 0.202ctルース

Tanzanian Kornerupine 0.202ct loose stone Sale price¥18,800
Tanzanian Kornerupine 3.2mm/0.129ct Loose Stone

Tanzanian Kornerupine 3.2mm/0.129ct Loose Stone Sale price¥6,980
Tanzanian Kornerupine 0.233ct loose stone

Tanzanian Kornerupine 0.233ct loose stone Sale price¥14,800
January birthstone rhodolite garnet rough stone and loose stone set of 2 (from Zambia) {Multiple purchase discounts available} {For beginners}

January birthstone rhodolite garnet rough stone and loose stone set of 2 (from Zambia) {Multiple purchase discounts available} {For beginners} Sale price¥2,980
April birthstone Morganite rough stone and loose stone set of 2 (from Nigeria) {Multiple purchase discounts available} {For beginners}

April birthstone Morganite rough stone and loose stone set of 2 (from Nigeria) {Multiple purchase discounts available} {For beginners} Sale price¥3,980
March birthstone, aquamarine rough stone and loose stone set of 2 (from Nigeria) {Multiple purchase discounts available} {For beginners}

March birthstone, aquamarine rough stone and loose stone set of 2 (from Nigeria) {Multiple purchase discounts available} {For beginners} Sale price¥3,980
November birthstone citrine rough and loose stone set of 2 (Madeira citrine, from Brazil) {Multiple purchase discounts available} {For beginners}

November birthstone citrine rough and loose stone set of 2 (Madeira citrine, from Brazil) {Multiple purchase discounts available} {For beginners} Sale price¥3,980
Limited to 6 stones: 1 synthetic moissanite loose stone (hexagonal cut, 5mm) Multiple purchase discounts available

Limited to 6 stones: 1 synthetic moissanite loose stone (hexagonal cut, 5mm) Multiple purchase discounts available Sale price¥6,980
Top Quality: Benitoite 7 Stones and Diamond 6 Stones (H&C) Half Eternity Ring Set (2.0mm)

Top Quality: Benitoite 7 Stones and Diamond 6 Stones (H&C) Half Eternity Ring Set (2.0mm) Sale price¥158,000
Top Quality Benitoite 13 Stone Half Eternity Ring Set (2.0mm)

Top Quality Benitoite 13 Stone Half Eternity Ring Set (2.0mm) Sale price¥248,000
Brazilian Paraiba Tourmaline 0.136ct loose stone (CuO: 1.8%, MnO: 2.0%)

Brazilian Paraiba Tourmaline 0.136ct loose stone (CuO: 1.8%, MnO: 2.0%) Sale price¥39,800
ブラジル産非加熱バイカラーパライバトルマリン 0.178ctルース

Brazilian unheated bicolor Paraiba tourmaline 0.178ct loose stone (CuO: 0.9%, MnO: 2.8%) Sale price¥298,000
ナイジェリア産コバルトガーナイト 0.242ctルース JTL鑑

Nigerian Cobalt Garnite 0.242ct Loose Stone JTL Catalog Sale price¥39,800
Nigerian Cobalt Garnite 0.233ct Loose Stone JTL Catalog

Nigerian Cobalt Garnite 0.233ct Loose Stone JTL Catalog Sale price¥45,800
スリランカ産コバルトガーナイト 0.214ctルース JTL鑑

Nigerian Cobalt Garnite 0.214ct Loose Stone JTL Catalog Sale price¥32,800
Limited to 1 set Synthetic sapphire & cubic zirconia Multiple purchase discounts available

Limited to 1 set Synthetic sapphire & cubic zirconia Multiple purchase discounts available Sale price¥8,800
Limited to 8 stones: Swiss blue topaz (4mm, rose cut) 1 loose stone. Discounts available for multiple purchases.

Limited to 8 stones: Swiss blue topaz (4mm, rose cut) 1 loose stone. Discounts available for multiple purchases. Sale price¥3,980
Elbaite tourmaline from Mozambique 1.138ct loose stone (CuO: 0.1%, Mn0: 1.6%)

Elbaite tourmaline from Mozambique 1.138ct loose stone (CuO: 0.1%, Mn0: 1.6%) Sale price¥59,800
Elbaite tourmaline from Mozambique 2.964ct loose stone (CuO: 0.1%, Mn0: 4.4%)

Elbaite tourmaline from Mozambique 2.964ct loose stone (CuO: 0.1%, Mn0: 4.4%) Sale price¥45,800
ブラジル産非加熱ピンクインペリアルトパーズ（シェリーピンク） 1.029ctルース

Brazilian unheated pink imperial topaz (sherry pink) 6.4mm/1.029ct loose stone Sale price¥59,800
アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 2.736ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 2.736ct loose stone Sale price¥79,800
アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 3.512ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 3.512ct Loose Sale price¥98,000
アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 2.888ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 2.888ct Loose Sale price¥88,000
ナミビア産ジェレメジェバイト 0.158ctルース

Namibian Jeremejevite 0.158ct loose stone Sale price¥45,800
ナミビア産ジェレメジェバイト 0.405ctルース

Namibian Jeremejevite 0.405ct loose stone Sale price¥128,000
ナミビア産ジェレメジェバイト 0.394ctルース

Namibian Jeremejevite 0.394ct loose stone Sale price¥128,000
オーストラリア産ボルダーオパール 23.164ctルース

Australian Boulder Opal 23.164ct Loose Sale price¥128,000
モザンビーク産ルベライト 2.752ctルース

Mozambique rubellite 2.752ct loose stone Sale price¥69,800
マダガスカル産パパラチアサファイア 0.261ctルース

Mozambique Rubellite 2.141ct Loose Stone Sale price¥69,800
マダガスカル産パパラチアサファイア 0.215ctルース

Madagascar Padparadscha Sapphire 0.208ct Loose DGL Sale price¥34,800

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の取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

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.