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Sold out Sri Lankan Cobalt Spinel (Blue Spinel) 3.202ct Loose Stone (Needle-like Inclusions) Japan-German Rare Stone
Sold out Sri Lankan Forsterite 0.231ct Loose Stone, Japan-German
Sold out 0.745ct loose bicolor sapphire from Windsor, Tanzania
Sold out Colombian emerald 10.940ct rough stone
Sold out Afghanistan Bicolor Beryl 9.100ct Loose Stone
Sold out Silky sapphire from Vietnam, 1.169ct loose stone
Sold out 【Yukinko Cut】 Siberian Blue Quartz (Synthetic Quartz) 2.503ct Loose
Sold out [Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 2.420ct Loose Stone
Sold out [Yukinko Cut] Siberian Blue Quartz (Synthetic Quartz) 0.999ct Loose Stone
Sold out [Yukinko Cut] Synthetic Sapphire 2.102ct Loose Stone
Sold out Tanzanian Kornerupine (with Goethite) 2.6mm/0.068ct Loose
Sold out Pink sapphire (with hematite) 0.271ct loose stone
Sold out 0.092ct loose stone with iolite and phlogopite (phlogopite)
Sold out Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 4.8mm/0.612ct Loose
Sold out Myanmar color change zircon 0.439ct loose stone
Sold out Tanzanian zircon, 1.672ct loose
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) 1.951ctルース
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) 1.827ctルース
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) 1.458ctルース
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 Tanzanian Spessartine Garnet 1.168ct Loose Stone
Sold out Tanzanite 0.505ct loose stone from Tanzania
Sold out Tanzanite from Tanzania 0.331ct loose stone
Sold out K18PG Thai Pigeon Blood Ruby 0.38ct Ring AIGS
Sold out [Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.638ct Loose
Sold out Pt950 American Benitoite 0.09ct Peach Benitoite Pinky Ring
Sold out Myanmar Red Spinel 0.196ct Loose Stone
Sold out 【12559896掲載】ブラジル産エレスチャルアメジスト 3.678ctルース
Sold out Sri Lankan green zircon 0.494ct loose stone
Sold out 【12561305掲載】アメリカ産オレゴンサンストーン 0.472ctルース
Sold out Lazulite (0.077ct) from Pakistan, loose
Sold out Brazilian Alexandrite 3.0mm/0.121ct Loose
Sold out Amber / Copal 41.008 ct Loose (with insect inclusion)
Sold out 【12561913掲載】オーストラリア産ブラックオパール 0.221ctルース
Sold out パキスタン産ヴィータニエミアイト 0.184ctルース
Sold out ピンクサファリン 0.178ctルース
Sold out Brazilian London Blue Topaz 0.641ct Loose
Sold out 【12561129掲載】スリランカ産イエローサファイア 0.291ctルース
Sold out 【12561168掲載】メキシコ産ウォーターオパール(ファセットカット) 0.349ctルース
Sold out 【12561176掲載】メキシコ産オパール(ファセットカット) 0.644ctルース
Sold out Brazilian Rainbow Scapolite 0.435ct Loose Stone
Sold out Synthetic rutile 3.9mm/0.329ct loose stone
Sold out Cambodian Blue Zircon (Ratanakiri Blue) 0.354ct Loose Stone
Sold out カンボジア産ブルージルコン(ラタナキリブルー) 0.519ctルース
Sold out 【12561526掲載】タンザニア産ピンクジルコン 1.736ctルース
Sold out Tanzanian Color Change Garnet 0.509ct Loose Stone
Sold out Madagascar Grandidierite 0.109ct loose stone
Sold out Pt950 ベニトアイト 0.17ct リング

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.