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Sold out Mali Garnet (Grossular/Andradite Garnet) 0.675ct Loose Stone

Mali Garnet (Grossular/Andradite Garnet) 0.675ct Loose Stone
Sold out American Neptunite 0.207ct Loose Stone with Certificate of Authenticity

American Neptunite 0.207ct Loose Stone with Certificate of Authenticity
Sold out 【12562061掲載】アメリカ産ネプチュナイト 0.256ctルース

0.256ct Neptunite from the USA, with a certificate

Sold out American Neptunite 0.290ct Loose Stone with Certificate of Authenticity

American Neptunite 0.290ct Loose Stone with Certificate of Authenticity
coming soon Canadian Eudialite 2.5mm/0.051ct Loose Stone with Certificate of Authenticity

Canadian Eudialite 2.5mm/0.051ct Loose Stone with Certificate of Authenticity Sale price¥18,800
Sold out Canadian Eudialyte 2.5mm/0.047ct Loose Stone with Certification

Canadian Eudialyte 2.5mm/0.047ct Loose Stone with Certification
Sold out 【12562053掲載】カナダ産カナダ産ユーディアライト 3.359ctルース

3.359ct Canadian Eudialyte Loose Stone with Identification Report
Sold out 【12562052掲載】カナダ産カナダ産ユーディアライト 5.714ctルース

Canadian Eudialite 5.714ct Loose Stone with Certificate of Authenticity
Sold out 【12562049掲載】オーストラリア産レインボーラティスサンストーン 0.373ctルース

Australian Rainbow Lattice Sunstone 0.373ct Loose

Sold out 【12562025掲載】ブラジル産ライモナイトインブルートパーズ 6.701ctルース

Brazilian Limonite in Blue Topaz 6.701ct Loose Stone

Sold out 【12562021掲載】ファイアオパール 6.742ctルース

Mexican fire opal 6.742ct loose

Sold out Datolite from the USA, 0.592ct Loose Stone (Westfield, Manchester)

Datolite from the USA, 0.592ct Loose Stone (Westfield, Manchester)

coming soon 【12562018掲載】ブラジル産ヘルデライト 0.509ctルース

Brazilian Herderite 0.509ct loose stone Sale price¥35,800
Sold out 【12562017掲載】ブラジル産ヘルデライト 0.421ctルース

Brazilian Herderite 0.421ct loose stone

coming soon 【12562015掲載】南アフリカ産南アフリカ産ロードクロサイト 2.694ctルース

[Lottery Sale 0620_03] South African Rhodochrosite 2.694ct Loose Stone Sale price¥228,000
Sold out 【12562009掲載】スペイン産スファレライト 1.475ctルース

Spanish Sphalerite 6.5mm/1.475ct Loose Stone
Sold out 【12562007掲載】スペイン産スファレライト 0.920ctルース

Spanish Sphalerite 5.6mm/0.920ct Loose Stone
Sold out 【12562005掲載】スペイン産スファレライト 0.878ctルース

Spanish Sphalerite 5.5mm/0.878ct Loose
Sold out 【12562003掲載】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） 1.207ctルース

Rainbow Garnet (Andradite Garnet) 1.207ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out 【12561997掲載】メキシコ産ファイアオパール 1.461ctルース

Mexican Fire Opal 1.461ct Loose (Egg-in-Opal)

Sold out 【12561996掲載】メキシコ産ファイアオパール 1.260ctルース

Mexican Fire Opal 1.260ct Loose
Sold out 【12558711掲載】ドゥニライト 0.132ctルース

Sri Lankan Dunilite 0.132ct Loose Stone with Certificate of Authenticity
Sold out バイカラーベニトアイト 0.282ctルース

[Authenticity Check] American Bicolor Benitoite 0.282ct Loose Stone

Sold out 0.085ct loose, non-oil red beryl from the United States, GIA

0.085ct loose, non-oil red beryl from the United States, GIA

Sold out Montana sapphire 0.359ct loose (blue sapphire)

Montana sapphire 0.359ct loose (blue sapphire)
Sold out Montana Sapphire 0.449ct loose (bicolor sapphire)

Montana Sapphire 0.449ct loose (bicolor sapphire)
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） 0.960ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 0.960ct loose
Sold out オーストラリア産レインボーラティスサンストーン 1.013ctルース

Australian Rainbow Lattice Sunstone 1.013ct Loose
Sold out オーストラリア産レインボーラティスサンストーン 1.635ctルース

Australian Rainbow Lattice Sunstone 1.635ct Loose
Sold out Indian alexandrite cat's eye 0.679ct loose

Indian alexandrite cat's eye 0.679ct loose
Sold out Indian alexandrite cat's eye 0.422ct loose

Indian alexandrite cat's eye 0.422ct loose
Sold out アフガニスタン産ハックマナイト 0.111ctルース

Afghanistan Hackmanite 0.111ct loose stone
Sold out ブラッドショットアイオライトサンストーン 1.250ctルース

Bloodshot Iolite Sunstone 1.250ct Loose
Sold out コッパールチルクォーツ 1.747ctルース

Copper rutilated quartz 1.747ct loose

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） 3.089ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 3.089ct loose
Sold out [12548259 published] Padparadscha sapphire 0.524ct loose

[12548259 published] Padparadscha sapphire 0.524ct loose
Sold out 【12548254掲載】パパラチアサファイア 0.474ctルース

[12548254 published] Padparadscha sapphire 0.474ct loose
Sold out Sri Lankan Ratotta Topaz 7.709ct Loose (White Topaz)

Sri Lankan Ratotta Topaz 7.709ct Loose (White Topaz)
Sold out バイカラートルマリン 0.974ctルース

Bicolor tourmaline 0.974ct loose
Sold out イエローダイヤモンド 0.212ctルース(FANCY DEEP ORANGY YELLOW, VS1)

Yellow diamond 0.212ct loose (FANCY DEEP ORANGY YELLOW, VS1)
coming soon ピンクダイヤモンド 0.055ctルース(FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.4mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥59,800
coming soon Pink diamond 2.2mm/0.041ct loose (FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.2mm/0.041ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥49,800
coming soon Pink diamond 2.3mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2)

Pink diamond 2.3mm/0.055ct loose (FANCY LIGHT PURPLE PINK, SI2) Sale price¥69,800
Sold out Pink diamond 2.2mm/0.043ct loose (FANCY LIGHT PURPLISH PINK, SI2)

Pink diamond 2.2mm/0.043ct loose (FANCY LIGHT PURPLISH PINK, SI2)
Sold out Bekily Blue Garnet from Madagascar (color change garnet) 0.163ct loose

Bekily Blue Garnet from Madagascar (color change garnet) 0.163ct loose
Sold out ベトナム産非加熱シルキーピンクサファイア 0.175ctルース

Unheated silky pink sapphire from Vietnam 0.175ct loose
Sold out アルマンディンガーネット 3.214ctルース

[Rouge cut] Almandine garnet 3.214ct loose

Sold out 【12561989掲載】アメリカ産オレゴンサンストーン 0.793ctルース

Oregon Sunstone from the United States, 6.0mm/0.793ct 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.