Custom Cut
Brazilian Green Tourmaline 3.943ct Loose Stone
Sale price¥39,800
Sri Lankan Yellow Sapphire 0.320ct Loose
Sale price¥15,800
Mexican Hyalite Opal 0.942ct Loose
Sale price¥9,800
Synthetic Alexandrite 0.460ct loose stone
Sale price¥14,800
Brazilian Rhodonite 1.558ct loose stone
Sale price¥22,800
[Takeshi Yamamoto] Brazilian Rock Crystal 12.725ct Loose
Sale price¥39,800
Colombian Euclase 1.344ct loose stone
Sale price¥26,800
[7/5 22:00 Fireworks] Colombian Euclase 1.408ct Loose Stone
Sale price¥24,800
Colombian Euclase 0.512ct Loose Stone
Sale price¥18,800
Colombian Euclase 1.776ct loose stone
Sale price¥15,800
Brazilian Swiss Blue Topaz 1.042ct Loose Stone
Sale price¥9,800
Brazilian Swiss Blue Topaz 1.043ct Loose Stone
Sale price¥8,800
2.744ct loose Rogerley fluorite from the UK
Sale price¥8,800
Colombian fluorite 6.327ct loose stone
Sale price¥25,800
Blue sapphire 0.282ct loose stone (teal color)
Sale price¥15,800
Madagascar Iolite 2.272ct loose stone
Sale price¥19,800
Tanzanite from Tanzania 0.642ct loose stone
Sale price¥12,800
Orange spinel 0.225ct loose stone
Sale price¥12,800
Nigerian Morganite 2.745ct loose stone
Sale price¥12,800
Ethiopian Sunstone 1.045ct Loose
Sale price¥15,800
Santa Maria Aquamarine 1.265ct Loose Stone
Sale price¥18,800
Brazilian Rhodonite 2.316ct loose stone
Sale price¥39,800
Brazilian Green Tourmaline 1.431ct Loose Stone
Sale price¥12,800
Brazilian Green Tourmaline 4.613ct Loose Stone
Sale price¥39,800
Sakura Shape Brazilian Topaz 8.1mm/2.211ct Loose Stone
Sale price¥29,800
Colombian Euclase 1.836ct loose stone
Sale price¥18,800
Mexican Hyalite Opal 0.873ct Loose
Sale price¥9,800
Mexican Hyalite Opal 0.664ct Loose
Sale price¥6,980
Mexican Hyalite Opal 3.917ct Loose
Sale price¥15,800
[On sale at 10pm on 7/6] Mexican Hyalite Opal 5.2mm/0.433ct Loose
Sale price¥8,800
Mexican Hyalite Opal 1.554ct Loose
Sale price¥7,980
Mexican Hyalite Opal 1.687ct Loose
Sale price¥9,800
Brazilian Dumortierite in Quartz 3.188ct loose stone (faceted cut)
Sale price¥12,800
Brazilian Dumortierite in Quartz 2.569ct loose stone (faceted cut)
Sale price¥19,800
Brazilian Dumortierite in Quartz 1.279ct loose stone (faceted cut)
Sale price¥9,800
Brazilian Dumortierite in Quartz 1.447ct loose stone (faceted cut)
Sale price¥18,800
Brazilian Dumortierite in Quartz 1.284ct loose stone (faceted cut)
Sale price¥9,800
Russian Diopside 1.506ct Loose Stone
Sale price¥29,800
Synthetic Alexandrite 0.570ct loose stone
Sale price¥18,800
Tanzania Peristerite 1.150ct Loose Stone (Royal Blue Moonstone)
Sale price¥12,800
Tanzania Peristerite 0.911ct Loose Stone (Royal Blue Moonstone)
Sale price¥15,800
Sri Lankan bicolor sapphire 0.484ct loose stone
Sale price¥12,800
[Takeshi Yamamoto] Bicolor Smoky Quartz 10.674ct Loose Stone
Sale price¥39,800
Madagascar Labradorite 0.931ct loose stone
Sale price¥8,800
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.