New stock

Limited to 5 stones: 1 synthetic moissanite loose stone (Sanjay cut hexagonal, 6mm) Multiple purchase discounts available Sale price¥8,800

Limited to 6 stones: Brazilian Medusa Quartz (Paraiba Quartz) cat cut 1 stone loose (6mm) Multiple purchase discount available Sale price¥7,980

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 1.885ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 1.885ct loose stone Sale price¥39,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.843ctルース

Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 5.1mm/0.843ct Loose Stone Sale price¥6,980

Spanish Andalusite 0.776ct loose stone Sale price¥11,800

Spanish Sphalerite 8mm/2.796ct loose stone Sale price¥69,800

ブラジル産パライバトルマリン 0.620ctルース（CuO：2.72%,MnO：4.93%）GIA&中宝分析

Brazilian Paraiba Tourmaline 0.620ct loose stone (CuO: 2.72%, MnO: 4.93%) GIA & Chuho analysis Sale price¥1,580,000

Fluorite rough stone from Yaogangshan, China, 72.518ct Sale price¥9,800

Colombian pyrite-mica emerald 0.739ct loose stone Sale price¥36,800

Colombian pyrite-mica emerald 0.628ct loose stone Sale price¥35,800

Colombian pyrite-mica emerald 0.649ct loose stone Sale price¥29,800

Colombian pyrite-mica emerald 0.901ct loose stone Sale price¥45,800

Colombian pyrite-mica emerald 0.983ct loose stone Sale price¥49,800

Colombian emerald rough stone 1.707ct Sale price¥18,800

Brazilian Rubellite 1.027ct Loose Stone Sale price¥69,800

Paraiba tourmaline from Brazil 0.047ct loose Sale price¥29,800

Brazilian Paraiba Tourmaline 0.068ct loose stone Sale price¥39,800

Paraiba tourmaline from Brazil 0.071ct loose Sale price¥39,800

Paraiba tourmaline from Brazil 0.052ct loose Sale price¥29,800

Paraiba tourmaline from Brazil 0.051ct loose Sale price¥29,800

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 0.230ct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

Bulgarian Green Sphalerite 0.403ct Loose Stone Sale price¥69,800

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) Sale price¥6,000

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

Tanzanian Kornerupine 0.202ct loose stone Sale price¥18,800

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} Sale price¥2,980

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} Sale price¥3,980

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 Sale price¥6,980

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

Brazilian Paraiba Tourmaline 0.136ct loose stone (CuO: 1.8%, MnO: 2.0%) Sale price¥39,800

Brazilian unheated bicolor Paraiba tourmaline 0.178ct loose stone (CuO: 0.9%, MnO: 2.8%) Sale price¥298,000

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

Tanzania Cobalt Spinel 0.211ct Loose Stone JTL Catalog Sale price¥29,800

Nigerian Cobalt Garnite 0.233ct Loose Stone JTL Catalog Sale price¥45,800

Nigerian Cobalt Garnite 0.214ct Loose Stone JTL Catalog Sale price¥32,800

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%) Sale price¥59,800

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

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.