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Sold out Kenyan Tsavorite 0.157ct Loose Gemstone

Kenyan Tsavorite 0.157ct Loose Gemstone
Sold out 0.321ct Blue Sapphire Loose Gemstone from Sri Lanka

0.321ct Blue Sapphire Loose Gemstone from Sri Lanka
Sold out ジンバブエ産スフェーン 0.477ctルース

Zimbabwean Sphene 0.477ct Loose Gemstone

Sold out メキシコ産ファイアオパール 0.728ctルース

Mexican Fire Opal 0.728ct Loose

Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 0.498ct Loose Stone

Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 0.498ct Loose Stone
Sold out Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.491ct Loose Stone

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.491ct Loose Stone
Sold out American Peridot 0.770ct Loose Stone

American Peridot 0.770ct Loose Stone
Sold out Australian black opal 0.435ct loose stone

Australian black opal 0.435ct loose stone
Sold out Sri Lankan Yellow Sapphire 0.526ct Loose

Sri Lankan Yellow Sapphire 0.526ct Loose
Sold out コンクパール（火焔模様有り） 0.439ctルース

Conch pearl (with flame pattern) 0.439ct loose
Sold out コンクパール（火焔模様有り） 0.387ctルース

Conch pearl (with flame pattern) 0.387ct loose

Sold out Cornflower Blue Sapphire 0.680ct Loose AIGS

Cornflower Blue Sapphire 0.680ct Loose AIGS
Sold out アメリカ産レッドベリル 0.143ctルース

American red beryl 0.143ct loose
Sold out アメリカ産レッドベリル 0.115ctルース

American red beryl 0.115ct loose
Sold out アメリカ産レッドベリル 0.208ctルース

American red beryl 0.208ct loose
Sold out Diamond 0.120ct loose (G, VS2, Excellent H&C)

Diamond 0.120ct loose (G, VS2, Excellent H&C)
Sold out ダイヤモンド 0.096ctルース(D, SI1)

Diamond 0.096ct loose (D, SI1, octagonal cut)
Sold out ダイヤモンド 0.126ctルース(F, VS2)

Diamond 0.126ct loose (F, VS2, octagonal cut)
Sold out ブラジル産パライバトルマリン 0.243ctルース

Paraiba tourmaline from Brazil 0.243ct loose

Sold out ブルージルコン 0.609ctルース

Cambodian Blue Zircon 0.609ct 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） 0.666ctルース

Andesine Labradorite from Madagascar (commonly known as Rainbow Moonstone) 0.666ct 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

Andesine Labradorite (commonly known as Rainbow Moonstone) from Madagascar 0.570ct loose
Sold out Paraiba tourmaline from Brazil 0.066ct loose

Paraiba tourmaline from Brazil 0.066ct loose
Sold out ナイジェリア産モルガナイト 0.889ctルース

Morganite from Nigeria 0.889ct loose
Sold out 【12560350掲載】ジンバブエ産ユークレース 0.138ctルース

Zimbabwean Euclase 0.138ct Loose Stone
Sold out [Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone

[Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone
Sold out 【12560359掲載】ジンバブエ産バイカラーユークレース 0.654ctルース

Zimbabwean Bicolor Euclase 0.654ct Loose Stone
Sold out Rough diamond (sawable) 0.466ct rough diamond (with trigon)

Rough diamond (sawable) 0.466ct rough diamond (with trigon)
Sold out 0.245ct rough diamond (with trigon)

0.245ct rough diamond (with trigon)
Sold out Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity

Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity
Sold out Tanzanian Violet Sapphire 0.920ct Loose

Tanzanian Violet Sapphire 0.920ct Loose
Sold out Tanzanian Kornerupine 0.103ct Loose Stone

Tanzanian Kornerupine 0.103ct Loose Stone
Sold out Cambodian Blue Zircon (Ratanakiri Blue) 0.674ct Loose Stone

Cambodian Blue Zircon (Ratanakiri Blue) 0.674ct Loose Stone
Sold out Afghanistan Blue Tourmaline 4.0mm/0.268ct Loose Stone (Lagoon Tourmaline)

Afghanistan Blue Tourmaline 4.0mm/0.268ct Loose Stone (Lagoon Tourmaline)
Sold out Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan

Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan
Sold out Cornflower Blue Sapphire 4.5mm/0.430ct Loose Stone AIGS

Cornflower Blue Sapphire 4.5mm/0.430ct Loose Stone AIGS
Sold out Grandidierite from Madagascar 0.167ct loose stone

Grandidierite from Madagascar 0.167ct loose stone
Sold out Grandidierite from Madagascar 0.169ct loose stone

Grandidierite from Madagascar 0.169ct loose stone
Sold out Zimbabwean Euclase 2.2mm/0.065ct Loose Stone

Zimbabwean Euclase 2.2mm/0.065ct Loose Stone
Sold out 0.848ct Loose Brazilian Medusa Quartz (Paraiba Quartz)

0.848ct Loose Brazilian Medusa Quartz (Paraiba Quartz)
Sold out Unheated star ruby ​​from Myanmar, 0.617ct loose

Unheated star ruby ​​from Myanmar, 0.617ct loose
Sold out 0.361ct loose Brazilian Paraiba Tourmaline (CuO:1.0%, MnO:3.6%)

0.361ct loose Brazilian Paraiba Tourmaline (CuO:1.0%, MnO:3.6%)
Sold out Brazilian Paraiba tourmaline 0.128ct loose stone (CuO: 1.7%, MnO: 3.4%)

Brazilian Paraiba tourmaline 0.128ct loose stone (CuO: 1.7%, MnO: 3.4%)

Sold out Unheated Pigeon Blood Ruby 0.710ct Loose Stone AIGS

Unheated Pigeon Blood Ruby 0.710ct Loose Stone AIGS
Sold out German Auchenite 0.083ct loose stone

German Auchenite 0.083ct loose stone
Sold out German Apatite 3.1mm/0.100ct Loose Stone

German Apatite 3.1mm/0.100ct Loose Stone

Sold out Indian Moonstone 5.0mm/0.474ct Loose Stone (Rose Cut)

Indian Moonstone 5.0mm/0.474ct Loose Stone (Rose Cut)
Sold out American benitoite 0.147ct loose

American benitoite 0.147ct loose

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.