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Sold out Loose Brazilian Medusa Quartz (Paraiba Quartz) 0.748ct
Sold out Afghan Kunzite 5.6mm/0.897ct Loose
Sold out 18K Yellow Gold American Peridot 0.339ct Diamond Ring
Sold out 《Limited to 15 Stones》Kornerupine Gacha💎Win a 0.413ct Kornerupine (Prismatine) from Tanzania with a Japanese and German Gemstone Report (Plus a Free Kornerupine from Ken's Collection)《Bulk Purchase Discount Available》
Sold out 《Limited to 16 stones》Cornflower Blue Sapphire with AIGS certificate, Royal Blue Sapphire with certificate, (Plus a beautiful yellow sapphire worth 5,980 yen as a bonus) 💎Blue Sapphire Gacha 《Multiple purchase discount available》
Sold out Grandidierite from Madagascar 0.228ct loose stone
Sold out [Limited to 6 Stones] Vietnamese Silky Pink Sapphire (Sanje Cut, Round, 3.0-3.3mm) Gacha [Bulk Purchase Discount Available]
Sold out Star Ruby from Sri Lanka, 5.0mm/1.062ct Loose Stone, with Identification Report
Sold out 南アフリカ産ダイヤモンド(メイカブル) 0.193ct原石
coming soon ブラジル産パライバトルマリン 0.132ctルース(CuO:2.1%.MnO:2.2%)
Sold out 【12546496掲載】ベトナム産非加熱シルキーピンクサファイア 0.161ctルース
Sold out パキスタン産オイルインクォーツ 0.361ctルース
Sold out パキスタン産オイルインクォーツ 0.325ctルース
Sold out American benitoite 0.076ct loose
Sold out American benitoite 0.076ct loose
Sold out モザンビーク産パライバトルマリン 0.227ctルース
Sold out [Koshu Precious Stones plusthree] Spanish Sphalerite 6.417ct Loose Stone
Sold out Colombian oil-free emerald 0.17ct loose GIA
Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.438ct loose stone with certificate of authenticity
Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.594ct loose stone with certificate of authenticity
Sold out Loose 0.901ct Imperial Topaz from Brazil with certificate
Sold out 0.915ct Loose Ludwigite in Peridot from Pakistan
Sold out Madagascar Bekily Blue Garnet (Color Change Garnet) 0.132ct Loose Stone
Sold out Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.150ct Loose
Sold out Russian Phenakite 0.615ct Loose Stone
Sold out Mexican fire opal 0.235ct loose (facet cut)
Sold out Sri Lankan green zircon 0.312ct loose stone
Sold out Mexican Water Opal 4.8mm/0.289ct Loose
Sold out Tanzanian Mandarin Garnet Loose Stone 0.315ct
Sold out Kunzite from Afghanistan 0.971ct loose stone
Sold out 0.168ct Unheated Silky Pink Sapphire from Vietnam
Sold out 0.218ct Unheated Silky Pink Sapphire from Vietnam
Sold out Cambodian Blue Zircon (Ratanakiri Blue) 0.537ct Loose
Sold out Tanzanian Almandine Garnet 0.586ct Loose
Sold out Hessonite Garnet from Sri Lanka 0.530ct Loose Gemstone
Sold out Hessonite Garnet from Sri Lanka 0.681ct Loose
Sold out Mali Garnet (Grossular/Andradite Garnet) from Mali 0.359ct Loose Stone
Sold out デュモルチェライトインクォーツ 3.814ct原石
Sold out タンザニア産レピドライト 1.035ctルース
Sold out インド産カバンサイト 2.163ctルース
Sold out ブラジル産インペリアルトパーズ 2.093ctルース
Sold out ブラジル産インペリアルトパーズ 0.359ctルース
Sold out Lazurite in quartz 0.353ct loose
Sold out Lazurite in quartz 0.877ct loose
Sold out Lazurite in quartz 0.959ct loose
Sold out Blue tourmaline 0.369ct loose Japanese-German book
coming soon Myanmar orange jade (jade) 0.531ct loose
Sold out ジンバブエ産バイカラーユークレース 0.197ct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.