Skip to content

Ruth

Sort by

Sold out Madagascar Bicolor Sapphire 5.8mm/1.006ct Loose
Sold out Madagascar Bicolor Sapphire 4.5mm/0.637ct Loose
Sold out Madagascar Sapphire 4.6mm/0.472ct Loose
Sold out Madagascar Bicolor Sapphire 3.6mm/0.232ct Loose
Sold out Brazilian Dumortierite in Quartz 2.012ct Loose Stone
Sold out Brazilian Dumortierite in Quartz 1.995ct Loose Stone
Sold out Brazilian Dumortierite in Quartz 1.924ct Loose Stone
Sold out Limited to 9 stones: Australian black opal (including semi-black opal) loose stone (includes a bonus white opal) (Multiple purchase discounts available)
Sold out スリランカ産エンスタタイト 2.159ctルース
Sold out ベリル 0.951ctルース
Sold out Beryl 6.5mm/1.032ct loose stone
Sold out パキスタン産カラーチェンジスフェーン 7.137ctルース
Sold out オーストラリア産ボルダーオパール 4.470ctルース
Sold out オレゴンサンストーン 1.157ctルース
Sold out Petalite 2.858ct loose
Sold out 【12545837掲載】モザンビーク産パライバトルマリン 0.256ctルース
Sold out 【サンジェ氏】パープルスピネル 0.995ctルース
Sold out メキシコ産ファイアオパール 4.5mm/0.244ctルース
Sold out ジルコン 0.416ctルース
Sold out クリソベリルキャッツアイ 2.283ctルース
Sold out モザンビーク産パライバトルマリン 0.229ctルース
Sold out チタン酸ストロンチウム 0.410ctルース
Sold out Internally Flawless Diamond (H&C) 3.8mm/0.210ct Loose (F, IF, 3 Excellent H&C) GIA & Chuho
Sold out Have fun guessing what you'll receive! Gacha set of two gemstones (including rare stones) (Multiple purchase discounts available)
Sold out ナイジェリア産グリーンベリル 0.258ctルース
Sold out American peridot 0.334ct loose stone
Sold out 0.447ct Loose Chrysoberyl Cat's Eye from Sri Lanka
Sold out 0.559ct Sri Lankan Chrysoberyl Cat's Eye Loose Stone
Sold out Sri Lankan Golden Sapphire 0.649ct Loose
Sold out 2.393ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)
Sold out 2.077ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)
Sold out Synthetic sapphire 1.416ct loose stone (synthetic pink sapphire)
Sold out Synthetic spinel 1.793ct loose stone
Sold out Synthetic cobalt spinel 1.886ct loose stone
Sold out Spinel 0.310ct loose
Sold out Brazilian Goshenite 0.527ct loose stone
Sold out Indian Moonstone 5.1mm/0.426ct Loose Stone (Rose Cut)
Sold out Mali Garnet (Grossular/Andradite Garnet) 0.872ct Loose Stone from the Republic of Mali with Certificate of Authenticity
Sold out インターナリーフローレスダイヤモンド(H&C) 4.45mm/0.305ctルース(F, IF, 3Excellent H&C) GIA&中宝
Sold out ブラックスターサファイア 1.410ctルース
Sold out Tanzanite 1 stone loose (5x7mm, oval cut) 《Multiple purchase discount available》
Sold out 【さくらインカット】マダガスカル産アパタイト 7.9mm/1.537ct《コラボ》ルース ワッペン
Sold out アルマンディンガーネット 2.076ctルース
Sold out 【甲州貴石切子plusthree】パイライトインクォーツ 12.164ctルース ワッペン付
Sold out 【甲州貴石切子】モルガナイト 14.931ct《コラボ》ルース ワッペン付
Sold out 【サンジェ氏】ブルージルコン 0.322ctルース
Sold out ロードライトガーネット 0.990ctルース
Sold out アマゾン産グリーンオパール 1.120ctルース

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.