Birthstone list
Brazilian Pink Tourmaline 0.862ct Loose Stone
Sale price¥12,800
Vietnam Aquamarine 0.398ct Loose
Sale price¥5,980
Vietnam Aquamarine 0.494ct Loose Stone
Sale price¥8,800
Brazilian Blue Tourmaline 0.196ct Loose
Sale price¥6,980
Brazilian Green Tourmaline 2.218ct Loose
Sale price¥25,800
Brazilian Bicolor Tourmaline 7.2mm/1.326ct Loose Stone
Sale price¥18,800
Namibian Green Tourmaline 7.0mm/1.206ct Loose Stone (Lagoon Tourmaline)
Sale price¥59,800
Chameleon Diamond Green Diamond 0.122ct Loose (FANCY GRAY GREEN, SI2)
Sale price¥69,800
Royal Blue Sapphire 0.730ct Loose AIGS
Sale price¥158,000
Brazilian Imperial Topaz 0.746ct Loose
Sale price¥18,800
Zimbabwean rough green diamond (sawable) 0.228ct rough (trigon)
Sale price¥79,800
0.183ct Trapiche Emerald Loose Stone from Colombia
Sale price¥39,800
0.938 ct Tanzanian Almandine Garnet Loose Stone
Sale price¥12,800
Myanmar Leuco Garnet 0.128ct Loose Stone with Certificate
Sale price¥25,800
0.108ct Loose Leuco Garnet from Myanmar, with identification report
Sale price¥22,800
Rough diamond from Botswana (sawable) 0.118ct rough (trigon)
Sale price¥29,800
Botswana rough diamond (sawable) 0.090ct rough (trigon)
Sale price¥22,800
Rough diamond from Botswana (sawable) 0.087ct (trigon)
Sale price¥21,800
Mexican fire opal loose stone, 1.857 ct
Sale price¥25,800
Mexican Fire Opal 2.279ct Loose Stone
Sale price¥15,800
Mexican Fire Opal 0.729 ct Loose Stone
Sale price¥8,800
0.210 ct Colombian Trapiche Emerald Loose Stone
Sale price¥39,800
Madagascar bicolor sapphire 3.7mm/0.271ct loose
Sale price¥6,980
Blue Sapphire 0.369ct Loose Gemstone with Japan-Germany Appraisal
Sale price¥22,800
Australian Black Opal 1.080ct Loose
Sale price¥39,800
0.755 ct Loose Australian Black Opal
Sale price¥12,800
0.520ct Loose Australian Black Opal
Sale price¥13,800
Tanzanite from Tanzania, 0.372ct Loose Stone
Sale price¥14,800
Lapis Lazuli 3.394ct Loose Stone
Sale price¥13,800
0.215ct Santa Maria Aquamarine from Brazil, Loose Stone with Certificate
Sale price¥15,800
Brazilian Santa Maria Aquamarine 0.183ct Loose Stone with Certification
Sale price¥12,800
【Carafuru】K18WG Diamond 1.03ct Pendant Top
Sale price¥128,000
[12550851] 2.944ct Mozambique pink tourmaline loose stone
Sale price¥39,800
0.065ct loose Paraiba tourmaline from Brazil (CuO: 1.6%, MnO: 2.4%)
Sale price¥49,800
South African diamond rough (sawable) 0.110ct rough
Sale price¥22,800
South African diamond rough (sawable) 0.085ct rough
Sale price¥15,800
Spessartite Garnet from Madagascar 1.053ct loose stone
Sale price¥29,800
Brazilian pink tourmaline 0.968ct loose stone
Sale price¥18,800
Tanzanian pink tourmaline 0.558ct loose stone
Sale price¥9,800
Sri Lankan Star Sapphire 2.093ct Loose
Sale price¥8,800
Sri Lankan Star Sapphire 1.339ct Loose
Sale price¥12,800
Sri Lankan Star Sapphire 1.682ct Loose
Sale price¥12,800
Sri Lankan Star Sapphire 1.225ct Loose
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.