Ruth

Brazilian Green Tourmaline 9.495ct Loose Sale price¥128,000

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.365ctルース

Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.365ct Loose Stone Sale price¥18,800

Brazilian Green Tourmaline 4.374ct Loose Stone Sale price¥98,000

[Camellia Cut] Brazilian Ametrine 4.293ct [Collaboration] Loose Patch Sale price¥49,800

Oregon Sunstone from the United States 0.941ct loose stone Sale price¥29,800

Bicolor Benitoite 0.601ct Loose Japanese-German Edition Sale price¥458,000

Nigerian Green Beryl 1.349ct Loose Stone Sale price¥98,000

Limited to 12 stones, Pakistani oil in quartz, moving bubbles, 1 loose stone, multiple purchase discounts available Sale price¥4,980

Tanzania Pink Zoisite 5.8mm/0.848ct Loose Stone Sale price¥198,000

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） 1.911ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 1.911ct loose stone Sale price¥39,800

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） 1.742ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 1.742ct loose stone Sale price¥37,800

Limited to 18 stones: Myanmar spinel (3.5mm, pentagonal cut) 1 loose stone. Discounts available for multiple purchases. Sale price¥2,980

Brazilian parti-color tourmaline 2.702ct loose stone Sale price¥69,800

【甲州貴石切子plusthree】ロッククリスタル 15mm/10.059ctルース《昴×灯》(ダブル切子タイプ) ワッペン

[Koshu Precious Stone Cut Plusthree] Rock Crystal 15mm/10.059ct Loose Stone "Subaru x Hikaru" (Double Cut Type) Patch Sale price¥45,800

Brazilian rhodonite 3.224ct loose stone Sale price¥98,000

Australian black opal 9.709ct loose stone Sale price¥158,000

Czech Aragonite 8.0mm/2.082ct Loose Stone Sale price¥69,800

Brazilian Rubellite 3.845ct loose stone Sale price¥198,000

Brazilian Paraiba Tourmaline 0.211ct loose stone Sale price¥49,800

Indian Rainbow Quartz (Iridescent Quartz) 0.940ct Loose Stone Sale price¥158,000

Diamond 0.128ct loose stone (cabochon cut, maroon cut) Sale price¥39,800

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

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

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

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

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

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

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

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

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

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

Namibian Jeremejevite 0.158ct loose stone Sale price¥45,800

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.