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合成ブラックオパール 5.013ctルース

Synthetic Black Opal 5.013ct Loose Sale price¥59,800
合成ブラックオパール 2.996ctルース

Synthetic black opal 2.996ct loose stone Sale price¥29,800
合成ブラックオパール 1.209ctルース

Synthetic black opal 1.209ct loose stone Sale price¥18,800
合成モアッサナイト 1.186ctルース

Synthetic Moissanite 1.186ct loose stone Sale price¥12,800
合成モアッサナイト 1.186ctルース

Synthetic Moissanite 1.186ct loose stone Sale price¥12,800
合成モアッサナイト 0.648ctルース

Synthetic Moissanite 5.9mm/0.648ct Loose Stone Sale price¥9,800
合成モアッサナイト 0.651ctルース

Synthetic Moissanite 5.9mm/0.651ct Loose Stone Sale price¥9,800
合成アレキサンドライト 0.330ctルース

Synthetic Alexandrite 0.330ct loose stone Sale price¥9,800
合成アレキサンドライト 0.502ctルース

Synthetic Alexandrite 0.502ct loose stone Sale price¥15,800
合成アレキサンドライト 0.282ctルース

Synthetic Alexandrite 0.282ct loose stone Sale price¥9,800
合成ブラックオパール 1.467ctルース

Synthetic Opal (Synthetic Black Opal) 1.467ct Loose Sale price¥12,800
合成ブラックオパール 10.910ctルース

Synthetic Opal (Synthetic Black Opal) 10.910ct Loose Sale price¥69,800
合成ブラックオパール 1.532ctルース

Synthetic Opal (Synthetic Black Opal) 1.532ct Loose Sale price¥15,800
【12555989掲載】合成オパール 0.651ctルース

Synthetic Opal (Synthetic Black Opal) 0.651ct Loose Sale price¥15,800
Limited to 5 stones: 1 synthetic moissanite loose stone (Sanjay cut hexagonal, 6mm) Multiple purchase discounts available

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: 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
合成モアッサナイト 0.372ctルース

Synthetic moissanite 0.372ct loose Sale price¥9,800
Sold out アイスブルーカラーの合成モアッサナイト1石ルース（5mm,アイスブルー）

Ice blue color synthetic moissanite 1 stone loose (5mm, ice blue)《Multiple purchase discount available》

Sold out Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available}

Lab-grown ice blue diamond set of two (synthetic diamond, VS class equivalent, 1mm) {Multiple purchase discount available}
Sold out Synthetic alexandrite 1 stone (round, mele size)《Discount available for multiple purchases》

Synthetic alexandrite 1 stone (round, mele size)《Discount available for multiple purchases》

Sold out 《Limited to 15 Stones》Ruby Gacha with 2 Pigeon Blood Rubies with Certificates (Synthetic Ruby as a Bonus)《Multiple Purchase Discount Available》

《Limited to 15 Stones》Ruby Gacha with 2 Pigeon Blood Rubies with Certificates (Synthetic Ruby as a Bonus)《Multiple Purchase Discount Available》
Sold out Limited 5 Stones: Synthetic Alexandrite Gacha (Princess Cut, 3.5-4.5mm) (Multi-Buy Discount Available)

Limited 5 Stones: Synthetic Alexandrite Gacha (Princess Cut, 3.5-4.5mm) (Multi-Buy Discount Available)
Sold out Limited to 3 stones: Synthetic Black Moissanite Loose Stone (2.5mm, Round Cut) - Multiple Purchase Discounts Available

Limited to 3 stones: Synthetic Black Moissanite Loose Stone (2.5mm, Round Cut) - Multiple Purchase Discounts Available
Sold out Pt900 合成アレキサンドライト 1.32ct ダイヤモンド 0.22ctペンダントトップ（ネックレストップ）鑑別書

Pt900 Synthetic Alexandrite 1.32ct, Diamond 0.22ct Pendant Top (Necklace Top) with Identification Report

Sold out 合成サファイア 1.791ctルース

[On sale 9/11 at 10 PM] Synthetic Blue Sapphire Loose Stone, 1.791 ct
Sold out Synthetic Alexandrite 0.841ct loose stone

Synthetic Alexandrite 0.841ct loose stone
Sold out [On Sale 10 PM, June 7] *Limited to 3 Sets* 1.0ct/D/VS-VVS/IDEAL Lab-Grown Diamond (Synthetic Diamond) & 2 Rare Cabochon Stones (Total of 3 Stones Included) *Multiple Purchase Discount Available*

[On Sale 10 PM, June 7] *Limited to 3 Sets* 1.0ct/D/VS-VVS/IDEAL Lab-Grown Diamond (Synthetic Diamond) & 2 Rare Cabochon Stones (Total of 3 Stones Included) *Multiple Purchase Discount Available*
Sold out 合成モアッサナイト 4.137ctルース

[Koshu Kiseki Kiriko pluesthree] Synthetic Moissanite 10mm/4.137ct Loose Stone

Sold out 合成アレキサンドライト 0.471ctルース

Synthetic Alexandrite 0.471ct loose stone
Sold out 合成モアッサナイト 0.682ctルース

Synthetic Moissanite 5.8mm/0.682ct Loose Stone
Sold out 合成アレキサンドライト 1.381ctルース

Synthetic Alexandrite, 1.381ct Loose
Sold out Pt900 合成アレキサンドライト 1.08ctct ペンダントトップ（ネックレストップ） 鑑別書

[COLORFUL] Pt900 Synthetic Alexandrite 1.08ct / Diamond 0.06ct Pendant Top (Necklace Top) with Appraisal Report
Sold out K18 合成ルビー ペンダントトップ（ネックレストップ）

[Calafuri] K18 Synthetic Ruby and Synthetic Spinel Pendant Top (Necklace Top) with Appraisal Report
Sold out 合成アレキサンドライト 1.355ctルース

Synthetic Alexandrite 1.355ct Loose Stone
Sold out 合成アレキサンドライト 1.355ctルース

Synthetic Alexandrite 1.355ct Loose Stone
Sold out 合成アレキサンドライト 0.557ctルース

Synthetic Alexandrite 0.557ct Loose Gemstone
Sold out 合成アレキサンドライト 0.885ctルース

Synthetic Alexandrite 0.885ct Loose

Sold out 合成アレキサンドライト 0.228ctルース

Synthetic Alexandrite 0.228ct Loose Stone
Sold out 合成サファイア 2.348ctルース

Synthetic sapphire, 2.348 ct loose stone
Sold out [Sakura Shape] Synthetic Sapphire 3.285ct Loose Stone

[Sakura Shape] Synthetic Sapphire 3.285ct Loose Stone
Sold out 【ゆきんこカット】合成サファイア 2.220ctルース（合成ブルーサファイア）

[Yukinko Cut] Synthetic Sapphire 2.220ct Loose (Synthetic Blue Sapphire)
Sold out 合成モアッサナイト 0.970ctルース

Synthetic Moissanite 0.970ct Loose Stone (Blue Moissanite)
Sold out Synthetic Blue Sapphire 2.012ct Loose (Synthetic Sapphire)

Synthetic Blue Sapphire 2.012ct Loose (Synthetic Sapphire)

Sold out Synthetic Blue Sapphire 0.886ct Loose (Synthetic Sapphire)

Synthetic Blue Sapphire 0.886ct Loose (Synthetic Sapphire)
Sold out [Sakura InCut] Synthetic Sapphire 2.610ct Loose Stone (Synthetic Pink Sapphire)

[Sakura InCut] Synthetic Sapphire 2.610ct Loose Stone (Synthetic Pink Sapphire)

Sold out [Yukinko Cut] Synthetic Sapphire 2.102ct Loose Stone

[Yukinko Cut] Synthetic Sapphire 2.102ct Loose Stone

Sold out Synthetic Alexandrite 2.046ct Loose

Synthetic Alexandrite 2.046ct Loose
Sold out 合成モアッサナイト（グレーブルー） 1.701ctルース

Synthetic moissanite (gray blue) 1.701ct loose

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.