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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
Limited to 1 set Synthetic sapphire & cubic zirconia Multiple purchase discounts available

Limited to 1 set Synthetic sapphire & cubic zirconia Multiple purchase discounts available Sale price¥8,800
合成モアッサナイト 10mm/4.121ctルース

Synthetic Moissanite 10mm/4.121ct Loose Stone (Portuguese Cut) Sale price¥19,800
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
合成オパール 1.914ctルース

Synthetic Opal 1.914ct Loose Sale price¥15,800
合成モアッサナイト 11.7mm/5.570ctルース (ポルトガルカット)

Synthetic Moissanite 11.7mm/5.570ct Loose Stone (Portuguese Cut) Sale price¥29,800
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 0.405ctルース

Synthetic Alexandrite 0.405ct loose stone Sale price¥9,800
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
Synthetic Moissanite 6.0mm/0.688ct Loose Stone

Synthetic Moissanite 6.0mm/0.688ct 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 8.679ctルース

Synthetic Moissanite 8.679ct loose stone Sale price¥39,800
合成モアッサナイト 7.999ctルース

Synthetic Moissanite 7.999ct loose stone Sale price¥39,800
合成モアッサナイト 8.931ctルース

Synthetic Moissanite 8.931ct loose stone Sale price¥55,800
Synthetic Moissanite 4.924ct loose stone

Synthetic Moissanite 4.924ct loose stone Sale price¥39,800
合成モアッサナイト 0.970ctルース

Synthetic Moissanite 0.970ct Loose Stone (Blue Moissanite) Sale price¥16,800
[Limited to 4 stones] Synthetic moissanite 1 stone loose (rose cut, 5.0mm) [Discount available for multiple purchases]

[Limited to 4 stones] Synthetic moissanite 1 stone loose (rose cut, 5.0mm) [Discount available for multiple purchases] 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
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 Sale price¥29,800
合成モアッサナイト 0.632ctルース

Synthetic Moissanite 0.632ct loose stone (tie cut) Sale price¥6,980
合成モアッサナイト 0.509ctルース

Synthetic Moissanite 0.509ct loose stone (tie cut) Sale price¥6,980
合成モアッサナイト 6.704ctルース

Synthetic moissanite 6.704ct loose Sale price¥29,800
合成モアッサナイト 0.748ctルース

Synthetic moissanite 6mm/0.748ct loose (star cut) Sale price¥19,800
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 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 Synthetic Blue Moissanite 1 Stone Loose (6mm, Round Cut) {Multiple Purchase Discounts Available}

Synthetic Blue Moissanite 1 Stone Loose (6mm, Round Cut) {Multiple Purchase Discounts Available}

Sold out 【さくらシェイプ】合成サファイア 8.533ctルース

[Sakura Shape] Synthetic Sapphire 8.533ct Loose
Sold out 合成オパール 1.157ctルース

Synthetic Opal 1.157ct Loose

Sold out 合成アレキサンドライト 0.491ctルース

Synthetic Alexandrite 0.491ct loose stone (princess cut)

Sold out 【甲州貴石切子plusthree】合成モアッサナイト 13.0mm/7.179ctルース

[Koshu Precious Stones Plusthree] Synthetic Moissanite 13.0mm/7.179ct Loose Stone

Sold out 合成オパール 1.447ctルース

Synthetic Opal 1.447ct Loose
Sold out 合成ブラックオパール 1.348ctルース

Synthetic Black Opal 7.5mm/1.348ct Loose
Sold out 合成モアッサナイト 0.672ctルース

Synthetic Moissanite 6.0mm/0.672ct Loose Stone
Sold out 【32501764掲載】ラボグロウンダイヤモンド（合成ダイヤモンド） 0.730ctルース(D, IF, IDEAL)

Lab-grown Diamond (Synthetic Diamond) 0.730ct Loose (D, IF, IDEAL)

Sold out 合成アレキサンドライト 1.061ctルース

Synthetic alexandrite 1.061ct loose

Sold out 合成アレキサンドライト 1.680ctルース

Synthetic alexandrite 1.680ct 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.