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Sold out [Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone
Sold out Unheated Brazilian Bicolor Topaz (Bicolor Blue Topaz) 2.884ct Loose Gemstone
Sold out 【12560350掲載】ジンバブエ産ユークレース 0.138ctルース
Sold out ナイジェリア産モルガナイト 0.889ctルース
Sold out Paraiba tourmaline from Brazil 0.066ct loose
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 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 ダイヤモンド 0.126ctルース(F, VS2)
Sold out ダイヤモンド 0.096ctルース(D, SI1)
Sold out Diamond 0.120ct loose (G, VS2, Excellent H&C)
Sold out アメリカ産レッドベリル 0.115ctルース
Sold out アメリカ産レッドベリル 0.143ctルース
Sold out Cornflower Blue Sapphire 0.680ct Loose AIGS
Sold out マダガスカル産デマントイドガーネット 38.035ct原石
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 モンゴル産アンデシン 1.354ctルース
Sold out Sri Lankan Yellow Sapphire 0.526ct Loose
Sold out Brazilian bicolor tourmaline 1.016ct loose stone
Sold out 1.091ct loose Australian black opal
Sold out Australian black opal 0.435ct loose stone
Sold out Australian black opal 3.148ct loose
Sold out Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.491ct Loose Stone
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 0.498ct Loose Stone
Sold out 0.321ct Blue Sapphire Loose Gemstone from Sri Lanka
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.894ct Loose Stone
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.867ct Loose Stone
Sold out Kenyan Tsavorite 0.157ct Loose Gemstone
Sold out Brazilian Indicolite Tourmaline 0.342ct Loose
Sold out Unheated Blue Sapphire from Madagascar, 1.380ct Loose, AIGS
Sold out Unheated Madagascar Purple Sapphire 1.170ct Loose GIT
Sold out Brazilian Dumortierite in Quartz 1.736ct Loose
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
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

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.