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Sold out 【12561945掲載】ブラジル産エメラルドインクォーツ 3.367ctルース
Sold out 【12561943掲載】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) 2.360ctルース
Sold out 【12561932掲載】合成ルチル 0.877ctルース
Sold out 【12561896掲載】ロンドンブルートパーズ 0.476ctルース
Sold out タンザニア産ロードライトガーネット 0.704ctルース
Sold out Diamond 2.9mm/0.094ct Loose (E, VVS2, VeryGood)
Sold out Madagascar Grandidierite 0.109ct loose stone
Sold out Tanzanian Color Change Garnet 0.509ct Loose Stone
Sold out Kenyan Tsavorite 0.164ct Loose Stone
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 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 Cambodian Blue Zircon (Ratanakiri Blue) 0.354ct Loose Stone
Sold out Synthetic Blue Sapphire 0.886ct Loose (Synthetic Sapphire)
Sold out 【12561316掲載】合成ルチル 0.768ctルース
Sold out Synthetic rutile 3.9mm/0.329ct loose stone
Sold out Brazilian Rainbow Scapolite 0.435ct Loose Stone
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 【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 【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 Brazilian London Blue Topaz 0.641ct Loose
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 Amber / Copal 41.008 ct Loose (with insect inclusion)
Sold out German Auyinite 3.5mm/0.131ct Loose Stone
Sold out Brazilian Alexandrite 3.0mm/0.121ct Loose
Sold out Lazulite (0.077ct) from Pakistan, loose
Sold out German Hauyne 2.2mm/0.035ct 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 Sri Lankan green zircon 0.494ct loose stone
Sold out タンザニア産バイカラーゾイサイト 0.312ctルース
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 Myanmar Red Spinel 0.196ct Loose Stone
Sold out 《Limited to 5 stones》Carving Gacha 💎 Green Quartz, Lemon Quartz, Blue Topaz 《Multiple Purchase Discount Available》
Sold out Limited to 14 stones: Rainbow Garnet from Tenkawa Village, Nara Prefecture (faceted by Saint-Jay) [Multiple purchase discounts available]
Sold out [#May2026Campaign, #May2026Gacha][On sale February 13, 10 PM] Limited 6 sets: Colombian Reverse Trapiche Emerald & Brazilian Emerald (Sugarloaf Cut) 2-stone set [Multi-buy discount available]
Sold out Madagascar Pezzottaite Gacha (2.2-2.5mm, Round Cut) - Limited to 6 Stones (Multiple Purchase Discount Available)
Sold out Limited to 13 stones! Bicolor Gacha 💎 Bicolor Sphene, usually priced at ¥79,800, Party-color Paraiba Tourmaline, usually priced at ¥39,800, and more. (Multiple Purchase Discount Available)
Sold out Color Change Gacha💎 Russian alexandrite, Brazilian alexandrite, and Tanzanian color-change garnets, usually priced at ¥39,800. 《Discounts for multiple purchases available》
Sold out 【12559339掲載】ブラジル産インペリアルトパーズ 4.321ctルース
Sold out [Sakura In-Cut] Oregon Sunstone from the United States, 6.0mm/0.638ct Loose
Sold out K18PG Thai Pigeon Blood Ruby 0.38ct Ring AIGS
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 Tanzanite from Tanzania 0.331ct loose stone
Sold out Sri Lankan Hessonite Garnet 1.674ct 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 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) 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) 1.951ct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

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.