Skip to content

Coming soon

Sort by

Sold out 【12544777掲載】クリソベリルキャッツアイ 1.342ctルース
Sold out Australian black opal 0.435ct loose stone
Sold out 1.091ct loose Australian black opal
Sold out Brazilian bicolor tourmaline 1.016ct loose stone
Sold out Sri Lankan Yellow Sapphire 0.526ct Loose
Sold out モンゴル産アンデシン 1.354ctルース
Sold out ブラジル産ティンカーベルクォーツ(ピンクファイヤークォーツ) 6.004ctルース
Sold out Cornflower Blue Sapphire 0.680ct Loose AIGS
Sold out アメリカ産レッドベリル 0.143ctルース
Sold out アメリカ産レッドベリル 0.115ctルース
Sold out ダイヤモンド 0.096ctルース(D, SI1)
Sold out ダイヤモンド 0.126ctルース(F, VS2)
Sold out マダガスカル産アンデシン・ラブラドライト(通称名 レインボームーンストーン) 0.666ctルース
Sold out マダガスカル産アンデシン・ラブラドライト(通称名 レインボームーンストーン) 0.570ctルース
Sold out Paraiba tourmaline from Brazil 0.066ct loose
Sold out 【12560350掲載】ジンバブエ産ユークレース 0.138ctルース
Sold out [Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone
Sold out 【12560359掲載】ジンバブエ産バイカラーユークレース 0.654ctルース
Sold out K18/Pt950 Brazilian Paraiba tourmaline 0.071ct diamond ring (K18YG, CuO: 1.9%, MnO: 2.2%)
Sold out 18K Yellow Gold Brazilian Paraiba Tourmaline 0.048ct Diamond Pinky Ring (CuO: 1.7%, MnO: 2.2%)
Sold out K18/Pt950 Brazilian Paraiba Tourmaline and Diamond Pendant Top (Necklace Top)
Sold out [Takeshi Yamamoto] Brazilian Dendritic Quartz 25.875ct Loose
Sold out 0.245ct rough diamond (with trigon)
Sold out Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity
Sold out Tanzanian Violet Sapphire 0.920ct Loose
Sold out Tanzanian Kornerupine 0.103ct Loose Stone
Sold out Cambodian Blue Zircon (Ratanakiri Blue) 0.674ct Loose Stone
Sold out Afghanistan Blue Tourmaline 4.0mm/0.268ct Loose Stone (Lagoon Tourmaline)
Sold out Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan
Sold out Cornflower Blue Sapphire 4.5mm/0.430ct Loose Stone AIGS
Sold out 【12560374掲載】ブルートパーズキャッツアイ 22.761ctルース
Sold out Tanzanian Dragon Garnet 1.181ct Loose Stone
Sold out Grandidierite from Madagascar 0.167ct loose stone
Sold out Grandidierite from Madagascar 0.169ct loose stone
Sold out Zimbabwean Euclase 2.2mm/0.065ct Loose Stone
Sold out 0.848ct Loose Brazilian Medusa Quartz (Paraiba Quartz)
Sold out Unheated star ruby ​​from Myanmar, 0.617ct loose
Sold out 0.361ct loose Brazilian Paraiba Tourmaline (CuO:1.0%, MnO:3.6%)
Sold out Unheated Pigeon Blood Ruby 0.710ct Loose Stone AIGS
Sold out Indian Moonstone 5.0mm/0.474ct Loose Stone (Rose Cut)
Sold out Mexican Fire Agate 8.033ct Loose Stone
Sold out American benitoite 0.133ct loose
Sold out マダガスカル産バイカラーサファイア 0.259ctルース
Sold out マダガスカル産バイカラーサファイア 0.212ctルース
Sold out ゴーシェナイト 1.989ctルース
Sold out ブラジル産トラピッチェアメジスト 24.772ctルース
Sold out オパール 0.595ctルース
Sold out Citrine 0.833ct loose stone

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.