Birthstone list
Australian black opal 0.296ct loose stone
Sale price¥8,800
Australian black opal 0.357ct loose stone
Sale price¥12,800
Vietnam unheated silky pink sapphire 0.178ct loose stone
Sale price¥5,980
Ruby 0.106ct loose
Sale price¥12,800
Brazilian Paraiba tourmaline in quartz 0.871ct loose
Sale price¥18,800
[Dandelion Cut] K18PG Yellow Sapphire 1.927 Ring Japanese-German Edition
Sale price¥298,000
K18 Orange Sapphire 1.980ct Pink Diamond Ring DGL Appraisal
Sale price¥198,000
Mozambique colorless tourmaline (acroite) 3.542ct loose stone
Sale price¥69,800
Afghanistan indigolite tourmaline 1.732ct loose stone
Sale price¥15,800
Afghanistan indigolite tourmaline 1.732ct loose stone
Sale price¥15,800
Afghanistan indigolite tourmaline 1.729ct loose stone
Sale price¥15,800
Afghanistan indigolite tourmaline 1.264ct loose stone
Sale price¥12,800
Green Sapphire 0.299ct Loose (Silky Sapphire)
Sale price¥3,980
Mexican Cantera Opal 15.195ct Loose
Sale price¥18,800
Mexican Fire Opal 1.104ct Loose
Sale price¥9,800
Brazilian Imperial Topaz 0.826ct Loose
Sale price¥19,800
Brazilian Imperial Topaz 0.746ct Loose
Sale price¥18,800
Brazilian Imperial Topaz 0.413ct Loose Stone
Sale price¥11,000
Brazilian Imperial Topaz 0.402ct Loose Stone
Sale price¥11,000
Brazilian Imperial Topaz 0.357ct Loose Stone
Sale price¥12,800
Brazilian Imperial Topaz 0.349ct Loose Stone
Sale price¥12,800
Brazilian Imperial Topaz 0.153ct Loose
Sale price¥5,980
Australian black opal 2.277ct loose stone (play of color on both sides)
Sale price¥34,800
Mexican egg-in-opal 1.243ct loose stone
Sale price¥14,800
Mexican egg-in-opal 0.865ct loose stone
Sale price¥14,800
Mexican egg-in-opal 0.672ct loose stone
Sale price¥12,800
Mexican egg-in-opal 0.627ct loose stone
Sale price¥8,800
Conch pearl 1.770ct loose (pink white)
Sale price¥14,800
Myanmar Trapiche Ruby 0.200ct Loose
Sale price¥12,800
Brazilian Paraiba tourmaline in quartz 4.772ct loose
Sale price¥59,800
Tanzanite 5mm/0.580ct loose stone (sugarloaf cut)
Sale price¥9,800
Aquamarine 0.398ct loose stone
Sale price¥8,800
Aquamarine 0.568ct loose stone
Sale price¥6,980
Sky blue topaz 0.563ct loose stone
Sale price¥5,980
Sky blue topaz 0.428ct loose stone
Sale price¥5,980
Brazilian imperial topaz 0.830ct loose
Sale price¥19,800
Tanzanite 0.349ct loose
Sale price¥9,800
Tanzanite 0.328ct loose stone
Sale price¥8,800
Pink tourmaline 0.416ct loose stone
Sale price¥8,800
Green tourmaline 0.090ct loose stone
Sale price¥6,980
Bicolor tourmaline 0.423ct loose
Sale price¥12,800
Bicolor tourmaline 0.552ct loose
Sale price¥12,800
Bicolor tourmaline 0.548ct loose
Sale price¥6,980
Ruby 0.282ct loose
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.