Custom Cut
[Takeshi Yamamoto] Brazilian Ametrine 29.930ct loose stone
Sale price¥79,800
Mexican Cantera Opal 14.458ct loose stone (faceted cut)
Sale price¥14,800
Synthetic Opal 2.026ct Loose
Sale price¥19,800
Opal 1.242ct loose stone
Sale price¥19,800
Tanzanian Sunstone (Illusion Sunstone) 0.823ct Loose Stone
Sale price¥12,800
Brazilian Dendritic Agate 1.481ct Loose Stone
Sale price¥12,800
Montana Agate 6.534ct Loose Stone
Sale price¥6,980
Brazilian Dumortierite in Quartz 0.313ct loose stone (faceted cut)
Sale price¥6,980
Brazilian Dumortierite in Quartz 0.154ct loose stone (faceted cut)
Sale price¥9,800
Brazilian rhodonite 1.277ct loose stone
Sale price¥8,800
Brazilian Green Spodumene 6.484ct Loose Stone
Sale price¥29,800
Brazilian Green Spodumene 0.599ct Loose Stone
Sale price¥4,980
Sapphire 0.328ct loose stone
Sale price¥12,800
Sri Lankan Yellow Sapphire 0.209ct Loose
Sale price¥15,800
Sri Lankan Yellow Sapphire 0.318ct Loose
Sale price¥15,800
Sri Lankan Yellow Sapphire 0.349ct Loose
Sale price¥15,800
Oregon Sunstone from the United States 0.276ct loose stone
Sale price¥7,980
Brazilian Madeira Citrine 0.564ct Loose Stone
Sale price¥8,800
Brazilian Madeira Citrine 4.7mm/0.414ct Loose Stone
Sale price¥8,800
Brazilian Madeira Citrine 0.489ct Loose Stone
Sale price¥7,980
Nigerian Morganite 0.948ct loose stone
Sale price¥8,800
[Sakura Shape] Brazilian Green Tourmaline 6.7mm/1.057ct Loose Patch
Sale price¥39,800
Sunstone 0.418ct loose stone
Sale price¥5,980
Mexican Cantera Opal 3.167ct loose stone (faceted cut)
Sale price¥12,800
Kunzite from Afghanistan 7.741ct loose stone
Sale price¥15,800
Andesine Labradorite (commonly known as Rainbow Moonstone) 0.568ct loose
Sale price¥12,800
Sri Lankan Blue Sapphire 0.251ct Loose
Sale price¥12,800
[Takeshi Yamamoto] Brazilian Ametrine 24.465ct loose stone
Sale price¥98,000
Cambodian colorless zircon 0.707ct loose stone
Sale price¥8,800
Tanzania Peristallite 5.4mm/0.397ct loose stone
Sale price¥7,980
[Cat cut (leopard print)] Amber 8.0mm/0.664ct loose stone
Sale price¥9,800
[Cat cut (cheetah pattern)] Amber 8.1mm/0.916ct loose stone
Sale price¥9,800
Ethiopian Opal 6.0mm/0.584ct Loose
Sale price¥12,800
Brazilian citrine 2.641ct loose stone
Sale price¥8,800
[Sakura Shape] Mexican Opal 8.2mm/1.465ct {Collaboration} Loose Patch
Sale price¥45,800
[Takeshi Yamamoto] Brazilian rose quartz 41.633ct loose stone
Sale price¥59,800
Brazilian Ametrine 11.843ct loose stone
Sale price¥22,800
Tanzanite from Tanzania 0.559ct loose stone
Sale price¥9,800
Tanzanite from Tanzania 0.479ct loose stone
Sale price¥7,980
Tanzanite from Tanzania 0.331ct loose stone
Sale price¥5,980
Brazilian Dendritic Agate 0.629ct Loose Stone
Sale price¥7,980
Brazilian Dendritic Agate 0.735ct Loose Stone
Sale price¥7,980
Brazilian London Blue Topaz 0.985ct Loose
Sale price¥8,800
Brazilian London Blue Topaz 0.966ct Loose Stone
Sale price¥8,800
Sri Lankan spinel 0.763ct loose stone
Sale price¥12,800
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.
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.