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Sold out 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） 0.631ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.631ct loose stone
Sold out 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
スペイン産アンダリュサイト 0.776ctルース

Spanish Andalusite 0.776ct loose stone Sale price¥11,800
スペイン産スファレライト 2.796ctルース

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
Sold out 中国・ヤオガンシャン産フローライト 72.518ct原石

Fluorite rough stone from Yaogangshan, China, 72.518ct
コロンビア産パイライト・雲母インエメラルド 0.739ctルース

Colombian pyrite-mica emerald 0.739ct loose stone Sale price¥36,800
コロンビア産パイライト・雲母インエメラルド 0.628ctルース

Colombian pyrite-mica emerald 0.628ct loose stone Sale price¥35,800
Sold out コロンビア産パイライト・雲母インエメラルド 0.649ctルース

Colombian pyrite-mica emerald 0.649ct loose stone
Sold out 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
Sold out 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
Sold out コロンビア産エメラルド 1.707ct原石

Colombian emerald rough stone 1.707ct
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
Sold out ブラジル産パライバトルマリン 0.072ctルース

Paraiba tourmaline from Brazil 0.072ct loose
Sold out 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%)
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
Sold out 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
Sold out ナイジェリア産コバルトガーナイト 0.179ctルース

Nigerian Cobalt Garnite 0.179ct Loose Stone JTL Catalog
Sold out ナイジェリア産コバルトガーナイト 0.707ctルース

Nigerian Cobalt Garnite 0.707ct Loose Stone JTL Catalog
Sold out 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
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
Sold out Benitoite 13 stone half eternity ring set (1.8mm, gradient set)

Benitoite 13 stone half eternity ring set (1.8mm, gradient set)
Limited to 7 sets: Gemstone Encyclopedia Playing Cards + Gemstone Lucky Bag (worth 10,000 yen) with 4 Stones

Limited to 7 sets: Gemstone Encyclopedia Playing Cards + Gemstone Lucky Bag (worth 10,000 yen) with 4 Stones 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
Sold out Tanzanian Kornerupine 3.2mm/0.129ct Loose Stone

Tanzanian Kornerupine 3.2mm/0.129ct Loose Stone
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¥178,000
Sold out Top Quality Benitoite 13 Stone Half Eternity Ring Set (2.0mm)

Top Quality Benitoite 13 Stone Half Eternity Ring Set (2.0mm)
Sold out 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%)
Sold out ブラジル産パライバトルマリン 0.202ctルース

Brazilian Paraiba Tourmaline 0.202ct loose stone (CuO: 0.6%, MnO: 0.1%)
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
Sold out 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
Tanzania Cobalt Spinel 0.211ct Loose Stone JTL Catalog

Tanzania Cobalt Spinel 0.211ct Loose Stone JTL Catalog Sale price¥29,800
Sold out Nigerian Cobalt Garnite 0.233ct Loose Stone JTL Catalog

Nigerian Cobalt Garnite 0.233ct Loose Stone JTL Catalog
Sold out Nigerian Cobalt Garnite 0.311ct Loose Stone JTL Catalog

Nigerian Cobalt Garnite 0.311ct Loose Stone JTL Catalog
Sold out 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
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
Sold out 華真珠（南洋真珠） 17.321ctルース

Hana Shinju (South Sea pearl) 17.321ct loose

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

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.