Coming soon

Tanzanian Almandine Garnet 0.930ct Loose Stone Sale price¥9,800

Greenland sapphire 0.133ct loose stone with certificate Sale price¥14,800

Oregon Sunstone 0.976ct loose Sale price¥18,800

Blue zircon 0.397ct loose stone Sale price¥6,980

[Rouge cut] Almandine garnet 2.090ct loose Sale price¥8,800

[On Sale at 10 PM on December 5th] YAG (Yttrium Aluminum Garnet) 6.5mm/1.548ct Loose Stone Sale price¥12,800

[On Sale at 10 PM on December 5th] Cambodian Blue Zircon (Ratanakiri Blue) 3.992ct Loose Stone Sale price¥59,800

[12/6 22:00] Tanzanian Green Zoisite 0.435ct Loose Stone Sale price¥12,800

Dioptase from Namibia 3.1mm/0.132ct loose Japanese-German edition Sale price¥55,800

Diamond 0.052ct loose (trapeze cut, VS class equivalent) Sale price¥6,980

Chrysoberyl cat's eye 2.553ct loose (bicolor) Sale price¥39,800

Chrysoberyl cat's eye 0.904ct loose Sale price¥12,800

Brazilian Medusa Quartz (Paraiba Quartz) 3.919ct loose Sale price¥6,980

Oregon Sunstone 1.157ct loose Sale price¥8,800

Yellow opal 17.283ct loose Sale price¥29,800

White topaz 16.06ct loose Sale price¥25,800

Petalite 2.858ct loose Sale price¥7,980

Bicolor grossular garnet 0.782ct loose Sale price¥12,800

South African rhodochrosite 1.333ct loose Japanese-German edition Sale price¥98,000

Brazilian Pink Tourmaline 5.0mm/0.484ct Loose Stone (Rose Cut) Sale price¥8,800

[12/10 22:00 Sale] Indian Moonstone 6.1mm/0.878ct Loose Stone (Rose Cut) Sale price¥8,800

[On Sale at 10 PM on December 9th] American Peridot 0.855ct Loose Stone (Lily Pad Inclusions) Sale price¥12,800

[12/9 22:00] Brazilian Lavender Quartz (Scorolite) 0.994ct Loose Stone Sale price¥8,800

[12/7 22:00] American Peridot 0.385ct Loose Stone Sale price¥8,800

[12/7 22:00] Brazilian Rubellite 0.332ct Loose Stone Sale price¥12,800

[12/7 22:00] Tanzanian Zoisite 1.312ct Loose Stone Sale price¥18,800

Tanzanian Chrome Tourmaline 0.164ct Loose Stone Sale price¥9,800

Brazilian Yellow Beryl 0.913ct Loose Stone Sale price¥8,800

Blue beryl (Mashish beryl) 3.268ct loose stone Sale price¥25,800

Sinhalite from Sri Lanka 0.456ct loose stone Sale price¥9,800

Mexican Water Opal (Faceted) 0.402ct Loose (Contrarus Opal) Sale price¥12,800

American Peridot 5.1mm/0.573ct Loose Stone Sale price¥9,800

[12/7 22:00] Brazilian Dumortierite in Quartz 16.250ct Loose Stone Sale price¥9,800

Sri Lankan Sinhalite 0.434ct Loose Stone Sale price¥8,800

Spanish bicolor sphalerite 6.230ct loose Sale price¥69,800

Bicolor Zoisite 0.581ct loose Sale price¥12,800

Dendritic Agate 31.019ct Ruth Japanese/German Sale price¥6,980

Mexican cantera opal 15.542ct loose Sale price¥15,800

Synthetic rutile 5.1mm/0.893ct loose stone Sale price¥9,800

Tanzanian Almandine Garnet 11.0mm/6.787ct Loose Stone Sale price¥49,800

Brazilian rose quartz 1.848ct loose stone Sale price¥9,800

Brazilian rose quartz 4.019ct loose stone Sale price¥11,000

Brazilian Dumortierite in Quartz 10.0mm/5.357ct Loose Stone Sale price¥39,800

Green sapphire 0.607ct loose stone Sale price¥12,800

Sri Lankan Yellow Sapphire 0.170ct Loose Sale price¥12,800

Sri Lankan Yellow Sapphire 0.182ct Loose Sale price¥9,800

Russian Demantoid Garnet (Horsetail) 4.2mm/0.325ct Loose Stone Sale price¥59,800

Unheated silky pink sapphire from Vietnam 0.247ct loose Sale price¥8,800

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.