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合成アレキサンドライト 0.460ctルース

Synthetic Alexandrite 0.460ct loose stone Sale price¥14,800
【サンジェ氏】合成モアッサナイト 8.950ctルース

Synthetic Moissanite 13.5mm/8.950ct Loose Sale price¥39,800
合成アレキサンドライト 0.560ctルース

Synthetic Alexandrite 0.560ct loose stone Sale price¥14,800
合成アレキサンドライト 0.570ctルース

Synthetic Alexandrite 0.570ct loose stone Sale price¥18,800
合成オパール 2.026ctルース

Synthetic Opal 2.026ct Loose Sale price¥19,800
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（グレー） 2.126ctルース

Synthetic Moissanite (Grey) 8.5mm/2.126ct Loose Stone Sale price¥18,800
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
【12555991掲載】合成オパール 0.723ctルース

Synthetic Opal (Synthetic Black Opal) 0.723ct 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
合成アレキサンドライト 0.578ctルース

Synthetic Alexandrite 0.578ct loose stone Sale price¥12,800
合成アレキサンドライト 0.841ctルース

Synthetic Alexandrite 0.841ct loose stone Sale price¥15,800
合成アレキサンドライト 0.287ctルース

Synthetic Alexandrite 0.287ct loose stone Sale price¥8,800
合成アレキサンドライト 0.471ctルース

Synthetic Alexandrite 0.471ct loose stone Sale price¥14,800
合成モアッサナイト 0.678ctルース

Synthetic Moissanite 5.8mm/0.678ct Loose Stone Sale price¥9,800
合成モアッサナイト 0.682ctルース

Synthetic Moissanite 5.8mm/0.682ct Loose Stone Sale price¥9,800
合成モアッサナイト 0.634ctルース

Synthetic Moissanite 0.634ct loose stone Sale price¥9,800
合成オパール 1.804ctルース

Synthetic Opal 1.804ct Loose Sale price¥14,800
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 13 stones》Synthetic Gacha (with additional synthetic alexandrite) including D/IF/3EX lab-grown diamonds normally priced at 39,800 yen and Sakura-cut YAGs normally priced at 59,800 yen. 《Multiple purchase discount available》

《Limited to 13 stones》Synthetic Gacha (with additional synthetic alexandrite) including D/IF/3EX lab-grown diamonds normally priced at 39,800 yen and Sakura-cut YAGs normally priced at 59,800 yen. 《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 合成アレキサンドライト 1.355ctルース

[On sale 10 PM, May 15th] Synthetic Alexandrite Loose Stone, 1.355 ct
Sold out 合成アレキサンドライト 0.557ctルース

【Sales from 10 PM on May 17th】Synthetic Alexandrite 0.557ct Loose Stone
Sold out 合成サファイア 2.348ctルース

【On Sale May 21st, 10 PM JST】Synthetic Sapphire 2.348 ct Loose Stone
[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* Sale price¥49,800
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 [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 2.393ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)

2.393ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)
Sold out 2.077ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)

2.077ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)

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.