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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
coming soon [On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"
Sold out [On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"
Sold out ベニトアイト 0.129ctルース
Sold out Limited to 10 stones: 1 Australian rainbow lattice sunstone loose stone (average 0.28ct) Multiple purchase discounts available
Sold out 宝石研磨に挑戦してみよう「自分で出来る原石磨きセット」(中級者向け:プレーナイト・葡萄石)
coming soon 【12563413掲載】コロンビア産エメラルド 0.158ctルース
coming soon 【12563069掲載】パパラチアサファイア 0.416ctルース
coming soon 【12563071掲載】パパラチアサファイア 0.156ctルース
coming soon 【12563070掲載】パパラチアサファイア 0.206ctルース
coming soon 【12563415掲載】コロンビア産エメラルド 0.147ctルース
coming soon 【12563417掲載】モザンビーク産ルビー 0.415ctルース
coming soon 【12563414掲載】コロンビア産エメラルド 0.167ctルース
coming soon [Lottery Sale_0612_09] Yellow Sapphire 2.150ct Loose Gemstone GIT
coming soon [Lottery Sale_0612_08] Unheated Purple Sapphire 0.775ct Loose Gemstone - Houseki Kyo
coming soon [Listed as 12563495] Euclase from Zimbabwe, 0.053ct Loose
coming soon [Published on 12563484] Madagascar Grandidierite 0.065ct Loose Stone

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.