New stock

Brazilian Green Tourmaline 0.935ct Loose Stone Sale price¥45,800

Brazilian Green Tourmaline 1.193ct Loose Stone Sale price¥49,800

Brazilian Green Tourmaline 11.453ct Loose Stone Sale price¥158,000

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

Tanzanite from Tanzania 6.006ct loose stone Sale price¥228,000

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Cobalt spinel from Tanzania 0.284ct loose Japanese and German

[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

Limited to 18 stones, Russian Phenakite rough, average 2.7ct, 1 stone, multiple purchase discounts available Sale price¥6,980

Limited to 15 stones! Green Oregon Sunstone rough stone from the United States 💎 Average 1.5ct [Multiple purchase discounts available] Sale price¥5,980

Pt950ブラジル産パライバトルマリン0.034ctリング（フリュクーシュ枠・オーバルカット）

Pt950 Brazilian Paraiba Tourmaline Ring (Fluid Setting, Oval Cut) Sale price¥64,800

K18YG Brazilian Paraiba Tourmaline Ring (Flucche Setting, Pear Shape, Matte Finish) Sale price¥69,800

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

[Limited to 24 stones] Oregon Sunstone from America with beautiful Schiller (Oval cut, 5 x 7mm) [Multiple purchase discount available] Sale price¥6,980

Brazilian Paraiba Tourmaline Ring and Half Eternity Ring Set (1.2mm) Sale price¥188,000

K18YG rose cut diamond 0.171ct ring Sale price¥89,800

K18YG American Turquoise 1.04ct Ring (Cat Cut) Sale price¥79,800

Pt950 Myanmar spinel 0.18ct 0.22ct earrings Sale price¥59,800

K18PGマダガスカル産ピンクサファイア0.24ct0.25ctピアス（アッシャーカット）

K18PG Madagascar pink sapphire 0.24ct 0.25ct earrings (Asscher cut) Sale price¥59,800

Madagascar Grandidierite 0.521ct loose stone Sale price¥128,000

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

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） 1.099ctルース

Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 1.099ct loose stone Sale price¥8,800

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

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

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.