Vertical: 3.1 - 4.0mm

Sri Lankan blue sapphire 0.187ct loose stone Sale price¥29,800

American Peridot 0.283ct Loose Stone Sale price¥8,800

Zimbabwean Bicolor Euclase 0.206ct Loose Stone Sale price¥49,800

Colombian emerald 0.121ct loose stone Sale price¥12,800

Nigerian Cobalt Garnite 0.171ct Loose Stone Sale price¥49,800

[12559637] Colombian emerald 0.176ct loose stone Sale price¥59,800

[12559636] Colombian emerald 0.126ct loose stone Sale price¥49,800

[On Sale at 10 PM on October 31st] Russian Demantoid Garnet (Horsetail Recognized) 0.110ct Loose Sale price¥49,800

[10/31 22:00 Sale] German Auchenite 0.073ct Loose Stone Sale price¥32,800

[On Sale at 10pm on October 31st] Madagascar Grandidierite 0.168ct Loose Stone Sale price¥35,800

[On Sale at 10 PM on October 29th] Brazilian Indigolite Tourmaline 0.222ct Loose Stone with Certificate of Authenticity Sale price¥11,000

[12559382] 0.176ct loose gemstone from Namibia Sale price¥39,800

[On Sale 10/23 10pm] Russian Demantoid Garnet (Horsetail Certified) 3.8mm/0.255ct Loose Stone Sale price¥39,800

[10/13 22:00 Sale] Pakistani Veirinite 0.147ct Loose Stone with Certificate of Authenticity Sale price¥36,800

[10/13 22:00 Sale] American Benitoite 0.175ct Loose Stone Sale price¥128,000

ラボグロウンダイヤモンド（合成ダイヤモンド） 0.290ctルース(FANCY VIVID PINK, VS-2)

[On Sale at 10 PM on October 12th] Lab-Grown Diamond (Synthetic Diamond) 0.290ct Loose (FANCY VIVID PINK, VS-2) Sale price¥45,800

[10/12 22:00 Sale] Pakistani Veirinite 0.145ct Loose Stone with Certificate of Authenticity Sale price¥36,800

[10/12 22:00 Sale] Brazilian Paraiba Tourmaline 0.052ct Loose Stone Sale price¥29,800

[On Sale at 10 PM on October 17th] Pigeon Blood Ruby 4.0mm/0.290ct Loose Stone AIGS Sale price¥59,800

[On Sale at 10 PM on October 19th] Greenland Ruby 3.6mm/0.220ct Loose Stone with Certificate Sale price¥39,800

[On Sale at 10 PM on October 19th] Greenland Ruby 3.6mm/0.210ct Loose Stone with Certificate Sale price¥45,800

[10/19 22:00 Sale] German Auchenite 0.095ct Loose Stone Sale price¥39,800

[10/19 22:00 Sale] German Auchenite 0.085ct Loose Stone Sale price¥45,800

[On sale from 10/21 at 10pm] German Auchenite 0.083ct Loose Stone Sale price¥45,800

[12552640] Unheated Brazilian Paraiba Tourmaline 0.073ct loose stone Sale price¥69,800

[12552618] Unheated Brazilian Paraiba Tourmaline 0.063ct loose stone Sale price¥65,800

[On Sale at 10 PM on October 12th] Russian Emerald 0.282ct Loose Stone (F1, Minor Enhancement) GIA Sale price¥128,000

Unheated Brazilian Paraiba tourmaline 0.082ct loose stone (CuO: 1.6%, MnO: 2.3%) Sale price¥79,800

[On Sale at 10 PM on September 30th] Afghanistan Hackmanite 0.115ct Loose Stone Sale price¥22,800

[On Sale at 10 PM on September 30th] Afghanistan Hackmanite 0.091ct Loose Stone Sale price¥18,800

[10/3 22:00 Sale] German Auchenite 0.090ct Loose Stone Sale price¥39,800

[On sale at 10pm on September 20th] German Auchenite 0.097ct Loose Stone Sale price¥39,800

[On sale at 10pm on September 16th] Sri Lankan saffron 0.116ct loose stone with certificate of authenticity Sale price¥25,800

[On Sale at 10 PM on September 16th] Brazilian Indigolite Tourmaline 4.0mm/0.240ct Loose Stone with Certificate of Authenticity Sale price¥29,800

[On Sale at 10 PM on September 13th] Mozambique Paraiba Tourmaline 0.154ct Loose Stone Sale price¥19,800

[On Sale at 10 PM on August 31st] Paraiba Tourmaline from Mozambique, 3.5mm/0.172ct Loose Stone Sale price¥15,800

[On Sale at 10 PM on September 3rd] Paraiba Tourmaline from Mozambique, 3.2mm/0.119ct Loose Stone Sale price¥9,800

[On Sale at 10 PM on August 31st] Colombian Mint Emerald 0.214ct Loose Sale price¥8,800

[On sale at 10pm on September 5th] Zambian emerald 0.135ct loose stone Sale price¥8,800

[On Sale at 10 PM on August 29th] 0.169ct Loose Pink Sapphire from Mozambique Sale price¥6,980

[On Sale at 10 PM on September 17th] Madagascar Pink Sapphire 0.145ct Loose Sale price¥6,980

[Sold at 10 PM on September 5th] Pink sapphire 0.179ct loose stone Sale price¥6,980

[On sale at 10pm on October 20th] Pink sapphire 0.115ct loose stone Sale price¥6,980

[On Sale at 10 PM on September 6th] 0.170ct Loose Blue Sapphire from Madagascar Sale price¥8,800

[On Sale at 10 PM on September 6th] 0.162ct Loose Blue Sapphire from Madagascar Sale price¥9,800

Padparadscha sapphire 0.220ct loose stone Sale price¥34,800

Red spinel 0.346ct loose stone Sale price¥22,800

[Available at 10 PM on August 16th] Tanzanian Purple Zoisite 4.0mm/0.262ct Loose Stone with Certificate of Authenticity Sale price¥11,000

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.