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Sold out 【12562085掲載】ブラジル産デュモルチェライトインクォーツ 0.603ctルース

0.603ct Brazilian Dumortierite in Quartz Faceted Loose Stone
Sold out 0.929ct Dumortierite in Quartz from Brazil Loose Gemstone

0.929ct Dumortierite in Quartz from Brazil Loose Gemstone
Sold out アメリカ産レッドベリル 0.120ctルース

American Red Beryl 0.120ct Loose
Sold out ブルージルコン 0.267ctルース

Cambodian blue zircon 0.267ct loose

Sold out モンタナサファイア 0.235ctルース

Montana Sapphire 0.235ct loose (yellow sapphire)
Sold out モンタナサファイア 0.458ctルース

Montana Sapphire 0.458ct Loose (Bi-Color Sapphire)
Sold out モンタナサファイア 0.416ctルース

Montana Sapphire 0.416ct Loose (Bi-Color Sapphire)
Sold out ピンクダイヤモンド 0.073ルース(FANCY DEEP PURPLISH PINK, SI1)

Pink Diamond 0.073 Loose (FANCY DEEP PURPLISH PINK, SI1)
Sold out Montana Sapphire 0.561ct loose (bicolor sapphire)

Montana Sapphire 0.561ct loose (bicolor sapphire)
Sold out モンタナサファイア 0.443ctルース

Montana Sapphire 0.443ct loose (green sapphire)
Sold out Pink diamond 0.030ct loose (FANCY PURPLE PINK, SI2)

Pink diamond 0.030ct loose (FANCY PURPLE PINK, SI2)
Sold out Pink diamond 0.070ct loose (FANCY INTENSE PURPLE PINK, I1)

Pink diamond 0.070ct loose (FANCY INTENSE PURPLE PINK, I1)
Sold out 【12559023掲載】ブラジル産アベンチュリンベリル 0.621ctルース

Brazilian Aventurine Beryl 5.5mm/0.621ct 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 【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 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

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 【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 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 [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 バイカラートルマリン 0.974ctルース

Bicolor tourmaline 0.974ct loose
Sold out Colombian trapiche emerald (reverse trapiche) 3.0mm/0.107ct rough stone (faceted cut)

Colombian trapiche emerald (reverse trapiche) 3.0mm/0.107ct rough stone (faceted cut)
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 【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
Sold out ブラジル産デュモルチェライトインクォーツ 0.673ctルース

【Sale starts 5/11 at 10 PM JST】Brazilian Dumortierite in Quartz 0.673 ct Loose Stone
Sold out Brazilian Dumortierite in Quartz 0.463ct Loose Stone (Faceted Cut)

Brazilian Dumortierite in Quartz 0.463ct Loose Stone (Faceted Cut)

Sold out ブラジル産デュモルチェライトインクォーツ 0.975ctルース

[Sales begin 10 PM, May 11th] Dumortierite in Quartz from Brazil, 0.975ct 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） 0.734ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 0.734ct 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） 0.826ctルース

Andesine Labradorite from Madagascar (commonly known as Rainbow Moonstone) 0.826ct loose
Sold out チベット産バイカラーアンデシン 0.685ctルース

Tibetan bicolor andesine 0.685ct loose
Sold out スリランカ産コバルトスピネル 0.647ctルース

Cobalt spinel from Sri Lanka 0.647ct loose Japanese German edition
Sold out 北海道産ロードクロサイト 0.835ctルース

Hokkaido rhodochrosite 0.835ct loose
Sold out 北海道産ロードクロサイト 0.955ctルース

Hokkaido rhodochrosite 0.955ct 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.