Product list

Indian Moonstone 8mm/1.879ct Loose Sale price¥6,980

Tanzanian Kornerupine 0.212ct loose stone Sale price¥19,800

0.221ct Loose Padparadscha Sapphire from Madagascar, accompanied by a Central Gem Laboratory certificate Sale price¥38,800

Madagascar Paparadscha Sapphire 3.4mm/0.252ct Loose Stone With CGL Certificate Sale price¥45,800

[Sale on 6/27 at 10 PM] Brazilian Lazulite (Lazulite) 0.067ct Loose Stone with Certificate Sale price¥49,800

[Sales start June 30th at 10 PM] Brazilian Lazulite 0.061ct Loose Stone with Gemstone Identification Report Sale price¥45,800

Ceylon ice blue sapphire, 1.134 ct, loose, with gemological report Sale price¥45,800

[On Sale June 28th at 10 PM] Afghanistan Green Hauyne 3.6mm/0.135ct Loose Stone with Appraisal Sale price¥35,800

【Sale starts July 6th at 10 PM JST】Madagascar Pezzottaite 0.323ct Loose Stone Sale price¥49,800

[Sale on July 6th at 10 PM] Brazilian Silky Alexandrite Loose Stone 0.265ct with Certificate Sale price¥45,800

[Sale on 7/1 at 10 PM] Tanzanian Pink Spinel 3.9mm/0.246ct Loose Stone with Certification Sale price¥35,800

[On sale July 1st, 10 PM JST] Brazilian Dioptase 0.956ct Loose Stone with Certificate Sale price¥23,800

[On Sale July 10th, 10 PM] Tanzanian Zircon 1.841ct Loose Gemstone with Certificate Sale price¥18,800

[On Sale 7/22, 10 PM JST] Orange Zircon from Tanzania 1.305ct Loose Stone with Certification Sale price¥13,800

[On sale July 10th at 10 PM] Zimbabwe Eucrase 0.138ct Loose Gemstone with Certificate Sale price¥29,800

[Sales start July 6, 10 PM] Bicolor Euclase from Zimbabwe 0.118ct Loose Gemstone with Certificate Sale price¥25,800

Unheated Ruby, 0.207 ct, Loose Stone, Hōki Kyō Sale price¥69,800

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） 0.582ctルース

[On sale June 21st at 10 PM] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 0.582ct Loose Stone Sale price¥6,980

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） 1.440ctルース

1.440 ct loose andesine-labradorite (commonly known as rainbow moonstone) from Madagascar Sale price¥25,800

K18 白蝶真珠（白蝶パール）鳥モチーフペンダントトップ（ネックレストップ）鑑別書

[Sale on 6/22 at 10 PM] Colorful K18 White South Sea Pearl, 0.17ct Diamond, Ruby, Sapphire, Emerald Bird Motif Pendant Top (Necklace Top) with Appraisal Report Sale price¥198,000

Zimbabwean Blue Apatite (UV Type) 0.650ct Loose Sale price¥9,800

Bolivian Ametrine 36.887ct loose stone Sale price¥79,800

YAG (Yttrium Aluminum Garnet) 3.9mm/0.317ct loose stone Sale price¥6,980

YAG (Yttrium Aluminum Garnet) 4.9mm/0.574ct loose stone Sale price¥8,800

Synthetic rutile 0.942ct loose stone Sale price¥14,800

YAG (Yttrium Aluminum Garnet) 4.1mm/0.346ct Loose Stone (Rose Cut) Sale price¥8,800

YAG (Yttrium Aluminum Garnet) 3.3mm/0.208ct Loose Stone (Rose Cut) Sale price¥5,980

Mexican Fire Opal 0.718ct Loose Sale price¥9,800

Mexican Fire Opal 0.593ct Loose (Faceted Cut) Sale price¥9,800

Brazilian Amethyst 9.749ct Loose Stone Sale price¥12,800

Nigerian bicolor tourmaline 0.379ct loose stone Sale price¥6,980

Tanzanian green sapphire 0.303ct loose stone Sale price¥8,800

Sri Lankan cobalt spinel 0.281ct loose stone Sale price¥55,800

Tanzania Purple Zoisite 0.863ct Rough Stone Sale price¥7,980

Colombian mint color emerald 0.297ct loose stone Sale price¥8,800

[Updated 12552163] Benitoite 0.099ct loose stone Sale price¥29,800

モザンビーク産パライバトルマリン 0.784ctルース（CuO:0.3%,MnO:1.3%）

[12550887] Paraiba Tourmaline from Mozambique 0.784ct loose stone Sale price¥128,000

Pakistani Oil in Quartz 0.438ct Loose Stone Sale price¥6,980

Madagascar sapphire 0.448ct loose stone Sale price¥15,800

[On sale June 27, 10 PM] Colorful K18 Blue Sapphire and Diamond Ring with Certificate Sale price¥128,000

[Sale on June 25th at 10 PM] Zimbabwe Euclase 0.067ct Loose Stone with Certification Sale price¥15,800

American Ceylanite 2.666ct Loose Stone with Certification Sale price¥15,800

[Sale begins June 26th, 10 PM JST] Sri Lankan Silky Sapphire 5.1mm/0.488ct Loose Rose Cut Gemstone Sale price¥7,980

[Sale Date: June 26th, 10 PM JST] Brazilian Medusa Quartz (Paraiba Quartz) 5.4mm/0.479ct Loose Stone (Rose Cut) Sale price¥12,800

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） 0.807ctルース

[On sale June 26th, 10 PM JST] Madagascar Andesine-Labradorite (Common name: Rainbow Moonstone) 0.807ct Loose Sale price¥8,800

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） 0.619ctルース

[On sale June 21st at 10 PM] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 0.619ct Loose Stone Sale price¥6,980

[On sale June 23rd at 10 PM] Sierra Leone rough diamond (sawable) 0.089ct rough (trigon) Sale price¥27,800

Madagascar Canary Yellow Chrysoberyl 0.650 ct Loose Stone with Certificate Sale price¥18,800

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.