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Sold out ベトナム産イエローベリル（ヘリオドール） 0.904ctルース

Vietnam Yellow Beryl (Heliodor) 0.904ct Loose Stone
Sold out ブラジル産アベンチュリンアクアマリン 1.450ctルース

Aventurine aquamarine 1.450ct loose
Sold out Brazilian Green Tourmaline 0.883ct Loose Stone

Brazilian Green Tourmaline 0.883ct Loose Stone
Sold out オーストラリア産ブラックオパール 0.357ctルース

Australian black opal 0.357ct loose stone
Sold out アルマンディンガーネット 0.785ctルース

Almandine Garnet 0.785ct Loose Stone
Sold out タンザニア産マンダリンガーネット 2.039ctルース

Tanzanian Mandarin Garnet 2.039ct Loose Stone
Sold out コーンフラワーブルーサファイア 1.080ctルース

Cornflower Blue Sapphire 1.080ct Loose AIGS

Sold out 【スタッフセレクション】バイカラーサファイア 0.384ctルース（セミオーダーメイドセット）

[Staff Selection] Tanzanian Bicolor Sapphire 0.384ct Loose (Semi-Custom Made Set)
Sold out エチオピア産オパール 0.625ctルース

Ethiopian Opal 4.9mm/0.625ct Loose (Sphere)
Sold out ロードライトガーネット 0.775ctルース

Tanzanian Rhodolite Garnet 0.775ct Loose Stone
Sold out ミャンマー産トラピッチェサファイア 0.206ctルース

Myanmar Trapiche Sapphire 0.206ct Loose
Sold out Synthetic Moissanite 6.0mm/0.688ct Loose Stone

Synthetic Moissanite 6.0mm/0.688ct Loose Stone
Sold out ブラジル産アレキサンドライト 0.134ctルース

Brazilian Alexandrite 3mm/0.134ct loose stone (rose cut)
Sold out ブラジル産アレキサンドライト 0.131ctルース

Brazilian Alexandrite 3.1mm/0.131ct Loose Stone (Rose Cut)
Sold out Bolivian Ametrine 31.854ct loose stone

Bolivian Ametrine 31.854ct loose stone
Sold out スリランカ産イエローサファイア 0.267ctルース

Sri Lankan Yellow Sapphire 0.267ct Loose
Sold out ゴーシェナイト 0.439ctルース

[12549597 published] Goshenite 0.439ct loose
Sold out 【カメリアカット】ラベンダークォーツ（スコロライト） 1.704ctルース　ワッペン付

[Posted in 12549756] Lavender quartz (scorolite) 1.704ct loose
Sold out 【スタッフセレクション】マダガスカル産バイカラーサファイア 0.330ctルース（セミオーダーメイドセット）

[Staff Selection] Madagascar Bicolor Sapphire 0.330ct Loose (Semi-Custom Made Set)
Sold out オーストラリア産ブラックオパール 2.233ctルース

[12551529] Australian black opal 2.233ct loose stone
Sold out アメリカ産アントヒルガーネット 6mm/0.896ctルース

American Anthill Garnet 6mm/0.896ct Loose Stone

Sold out ブラジル産ライモナイトイントパーズ 4.743ctルース

Brazilian Limonite in Topaz 4.743ct loose stone

Sold out Spring-colored gemstone 13-stone set (Madagascar fancy color sapphire) and half eternity ring set (2.0mm)

Spring-colored gemstone 13-stone set (Madagascar fancy color sapphire) and half eternity ring set (2.0mm)
Sold out 南アフリカ産ダイヤモンド原石（ソーヤブル） 0.091ct原石

South African diamond rough (sawable) 0.091ct rough
Sold out マダガスカル産ブルーサファイア 0.401ctルース

Madagascar Blue Sapphire 0.401ct Loose
Sold out 【スタッフセレクション】タンザニア産タンザナイト 0.262ctルース（セミオーダーメイドセッ

[Staff Selection] Tanzanite 0.262ct loose stone from Tanzania (semi-custom made set)
Sold out 【スタッフセレクション】【KEN氏】タンザニア産ピンクトルマリン 0.290ctルース（セミオーダーメイドセッ

[Staff Selection] [Mr. KEN] Tanzanian Pink Tourmaline 0.290ct Loose (Semi-Custom Made Set)
Sold out サンタマリアアクアマリン 0.523ctルース

[Staff Selection] Brazilian Santa Maria Aquamarine 5.1mm/0.523ct Loose Stone (Semi-Custom Made Set)
Sold out グリーントルマリン 0.475ctルース

[Staff Selection] Brazilian Green Tourmaline 0.475ct Loose (Semi-Custom Made Set)
Sold out オパール 0.629ctルース

Ethiopian Opal 0.629ct Loose (Sphere)
Sold out ピンクダイアスポア 0.205ctルース

Turkish pink diaspore 0.205ct loose stone
Sold out アメトリン 7.238ctルース

[Koshu Precious Stones plusthree] Ametrine 7.238ct loose stone with patch

Sold out 6-Piece Limited Edition Malawi Moonstone (Malawi-sourced moonstone, average 1.5ct) (Multi-item discount available)

6-Piece Limited Edition Malawi Moonstone (Malawi-sourced moonstone, average 1.5ct) (Multi-item discount available)
Sold out 《Limited to 10 Stones》Win a Koshu cut "Checker x Comet" Mexican fire opal, normally priced at 79,800 yen! 💎Fire Opal Gacha (Plus, get one extra "Contraluz" stone!) 《Bulk purchase discount available》

《Limited to 10 Stones》Win a Koshu cut "Checker x Comet" Mexican fire opal, normally priced at 79,800 yen! 💎Fire Opal Gacha (Plus, get one extra "Contraluz" stone!) 《Bulk purchase discount available》
Sold out Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]

Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]
Sold out 《Limited to 10 stones》Mozambique Grape Garnet loose stone (6×4mm, pear cut) 《Bulk purchase discount available》

《Limited to 10 stones》Mozambique Grape Garnet loose stone (6×4mm, pear cut) 《Bulk purchase discount available》
Sold out Big Gem Gacha 💎 including Dandelion Cut 15mm and Camellia Cut 19mm, normally 55,800 JPY《Multiple Purchase Discount Available》

Big Gem Gacha 💎 including Dandelion Cut 15mm and Camellia Cut 19mm, normally 55,800 JPY《Multiple Purchase Discount Available》
Sold out Limited to 8 stones - New in Tucson - Canadian Eudialite (Round Cut, Approx. 2mm) - Multiple purchase discounts available

Limited to 8 stones - New in Tucson - Canadian Eudialite (Round Cut, Approx. 2mm) - Multiple purchase discounts available
Sold out Limited to 13 stones! Bicolor Gacha 💎 Bicolor Sphene, usually priced at ¥79,800, Party-color Paraiba Tourmaline, usually priced at ¥39,800, and more. (Multiple Purchase Discount Available)

Limited to 13 stones! Bicolor Gacha 💎 Bicolor Sphene, usually priced at ¥79,800, Party-color Paraiba Tourmaline, usually priced at ¥39,800, and more. (Multiple Purchase Discount Available)
Sold out Color Change Gacha💎 Russian alexandrite, Brazilian alexandrite, and Tanzanian color-change garnets, usually priced at ¥39,800. 《Discounts for multiple purchases available》

Color Change Gacha💎 Russian alexandrite, Brazilian alexandrite, and Tanzanian color-change garnets, usually priced at ¥39,800. 《Discounts for multiple purchases available》
Sold out Brazilian Paraiba Tourmaline (CuO: 2.3% and CuO: 1.4%) & Kornerupine Rough Gacha 《Multiple Purchase Discount Available》

Brazilian Paraiba Tourmaline (CuO: 2.3% and CuO: 1.4%) & Kornerupine Rough Gacha 《Multiple Purchase Discount Available》
Sold out Blue Stone Gacha💎 (Brazilian Paraiba Tourmaline, Mozambique Paraiba Tourmaline, German Auchenite, Benitoite) {Multiple Purchase Discounts Available}

Blue Stone Gacha💎 (Brazilian Paraiba Tourmaline, Mozambique Paraiba Tourmaline, German Auchenite, Benitoite) {Multiple Purchase Discounts Available}
Sold out Limited to 11 stones: Bicolor Gacha (including Zimbabwean bicolor euclase, bicolor sapphire, and bicolor zoisite) (Multiple purchase discounts available)

Limited to 11 stones: Bicolor Gacha (including Zimbabwean bicolor euclase, bicolor sapphire, and bicolor zoisite) (Multiple purchase discounts available)
Sold out Limited to 6 stones: 1 loose Brazilian pyrite in quartz (average 3.2 carats) Multiple purchase discounts available

Limited to 6 stones: 1 loose Brazilian pyrite in quartz (average 3.2 carats) Multiple purchase discounts available
Sold out Limited to 8 stones: 1 loose Brazilian ametrine (concave cut, average 10 carats) Multiple purchase discounts available

Limited to 8 stones: 1 loose Brazilian ametrine (concave cut, average 10 carats) Multiple purchase discounts available
Sold out Limited to 10 stones! Spinel Gacha: 1 loose stone including a 1.17ct bicolor spinel. Multiple purchase discounts available.

Limited to 10 stones! Spinel Gacha: 1 loose stone including a 1.17ct bicolor spinel. Multiple purchase discounts available.
Sold out Limited Edition of 10 Bicolor Gacha! 💎 Includes two Zimbabwean euclase stones (average 0.088ct), a 1.03ct bicolor sapphire, a bicolor chrysoberyl, and more. Discounts available for multiple purchases.

Limited Edition of 10 Bicolor Gacha! 💎 Includes two Zimbabwean euclase stones (average 0.088ct), a 1.03ct bicolor sapphire, a bicolor chrysoberyl, and more. Discounts available for multiple purchases.

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.