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0.5–1.0 ct

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Andalusite 0.604ct loose Sale price¥6,980

Purple spinel 0.754ct loose Sale price¥9,800

Sold out オーストラリア産ブラックオパール 0.565ctルース
Sold out 【12561658掲載】タンザニア産タンザナイト 0.558ctルース
Sold out Tanzanite 0.505ct loose stone from Tanzania
Sold out Brazilian Santa Maria Aquamarine 0.669ct Loose Stone
Sold out 奈良県天川村産レインボーガーネット(アンドラダイトガーネット) 0.989ctルース
Sold out 【12561507掲載】ブラジル産ラベンダークォーツ(スコロライト) 0.716ctルース
Sold out Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 4.8mm/0.612ct Loose
Sold out カラーチェンジジルコン 0.556ctルース
Sold out [Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 0.999ct Loose Stone
Sold out 0.745ct loose bicolor sapphire from Windsor, Tanzania

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.