Birthstone list

Mexican Cantera Opal 4.456ct Loose Sale price¥39,800

Opal 426.985ct rough stone Sale price¥29,800

【ダンデライオンカット】YAG（イットリウムアルミニウムガーネット）8mm/2.752ctルース

[Dandelion cut] YAG (yttrium aluminum garnet) 8mm/2.752ct loose Sale price¥45,800

[On Sale at 10 PM on August 14th] 0.327ct Loose Yellow Sapphire from Madagascar Sale price¥12,800

[On Sale at 10 PM on August 9th] Madagascar Pink Sapphire 0.324ct Loose Sale price¥12,800

[On Sale at 10 PM on August 13th] Madagascar Sapphire 0.298ct Loose Sale price¥12,800

[On sale from 10pm on August 4th] Madagascar sapphire 0.289ct loose stone Sale price¥12,800

[On Sale at 10 PM on August 9th] Madagascar Sapphire 0.503ct Loose Sale price¥15,800

[On Sale at 10 PM on August 2nd] Madagascar Sapphire 0.344ct Loose Sale price¥12,800

[On Sale at 10 PM on August 6th] Brazilian Aquamarine 0.342ct Loose Stone Sale price¥5,980

[On Sale at 10 PM on August 6th] Brazilian Aquamarine 0.287ct Loose Stone Sale price¥6,980

[September 12th at 10pm] Brazilian Aquamarine 0.223ct Loose Stone Sale price¥8,800

[On Sale at 10 PM on August 11th] Brazilian Aquamarine 0.419ct Loose Stone (Princess Cut) Sale price¥8,800

[On Sale at 10 PM on August 17th] Brazilian Aquamarine 0.238ct Loose Stone (Princess Cut) Sale price¥5,980

[On Sale at 10 PM on August 14th] Brazilian Aquamarine 0.494ct Loose Stone Sale price¥8,800

[8/13 22:00 Sale] Brazilian Aquamarine 0.255ct Loose Stone Sale price¥6,980

[On Sale at 10 PM on August 4th] Brazilian Aquamarine 0.463ct Loose Stone Sale price¥6,980

[On Sale at 10 PM on August 17th] Brazilian Aquamarine 0.239ct Loose Stone (Princess Cut) Sale price¥8,800

[On Sale at 10 PM on August 9th] Brazilian Aquamarine 0.228ct Loose Stone Sale price¥6,980

[On Sale at 10 PM on August 3rd] Brazilian Aquamarine 0.214ct Loose Stone (Princess Cut) Sale price¥6,980

[On Sale at 10 PM on August 5th] Tanzanian Rhodolite Garnet 0.391ct Loose Stone Sale price¥6,980

[On Sale at 10 PM on August 5th] Tanzanian Rhodolite Garnet 0.643ct Loose Stone Sale price¥6,980

[On Sale at 10 PM on August 5th] Tanzanian Rhodolite Garnet 0.511ct Loose Stone Sale price¥6,980

[8/11 22:00 Sale] Tanzanian Rhodolite Garnet 0.734ct Loose Stone Sale price¥6,980

[On Sale at 10 PM on August 17th] Tanzanian Rhodolite Garnet 4.5mm/0.394ct Loose Stone Sale price¥6,980

[On Sale at 10 PM on August 9th] Tanzanian Rhodolite Garnet 0.380ct Loose Stone Sale price¥5,980

[On Sale at 10 PM on August 9th] Tanzanian Rhodolite Garnet 0.370ct Loose Stone Sale price¥6,980

[On Sale at 10 PM on August 9th] Tanzanian Rhodolite Garnet 0.336ct Loose Stone Sale price¥6,980

[On Sale at 10 PM on August 9th] American Peridot 5.1mm/0.566ct Loose Stone Sale price¥9,800

[On Sale at 10 PM on August 9th] American Peridot 4.9mm/0.488ct Loose Stone Sale price¥8,800

[On Sale at 10 PM on August 17th] American Peridot 4.5mm/0.370ct Loose Stone Sale price¥8,800

[On Sale at 10 PM on August 15th] Brazilian London Blue Topaz 0.429ct Loose Sale price¥6,980

[On Sale at 10 PM on August 15th] Brazilian London Blue Topaz 0.321ct Loose Sale price¥5,980

[8/16 22:00 Sale] Brazilian Aquamarine 0.259ct Loose Stone Sale price¥6,980

[On sale at 10pm on August 15th] Sri Lankan Star Sapphire 2.062ct Loose Sale price¥12,800

ロシア産デマントイドガーネットキャッツアイ（ホーステール認む） 3mm/0.159ctルース

Russian demantoid garnet cat's eye (horsetail recognized) 3mm/0.159ct loose Sale price¥18,800

Mexican cantera opal 8.454ct loose Sale price¥3,980

【甲州貴石切子plusthree】コロンビア産パイライトインエメラルド 5.076ctルースワッペン付

[Koshu Precious Stone Kiriko PlusThree] Colombian Pyrite in Emerald 5.076ct Loose with Patch Sale price¥98,000

【甲州貴石切子plusthree】メキシコ産ファイアオパール 1.981ctルースワッペン付

[Koshu precious stone Kiriko plusthree] Fire opal from Mexico 1.981ct loose with emblem Sale price¥49,800

Brazilian Paraiba tourmaline 181.342ct raw stone Sale price¥9,800

Paraiba tourmaline 233.409ct raw stone from Brazil Sale price¥12,800

[Koshu Precious Stone Kiriko] Ametrine 8.964ct《Collaboration》Loose with emblem Sale price¥69,800

Colombian oil-free emerald 0.535ct loose Japanese-German edition Sale price¥248,000

Green tourmaline 0.305ct loose stone Sale price¥3,980

Pink tourmaline 0.915ct loose Sale price¥7,980

【甲州貴石切子】コロンビア産エメラルド 1.701ct《コラボ》ルースワッペン付

[Koshu Precious Stone Kiriko] Colombian Emerald 1.701ct《Collaboration》With Loose Patch Sale price¥79,800

Colombian trapiche emerald (reverse trapiche) 0.101ct rough stone Sale price¥12,800

Pink tourmaline 0.506ct loose Sale price¥5,980

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.