Birthstone list
Pink diamond 0.063ct loose (FANCY INTENSE PURPLE PINK, I-1)
Sale price¥138,000
Pink diamond 0.067ct loose (FANCY INTENSE PURPLE PINK, I-1)
Sale price¥148,000
Mint green sapphire 0.348ct loose
Sale price¥12,800
Mint color tourmaline 0.115ct loose
Sale price¥5,980
Mint color tourmaline 0.198ct loose
Sale price¥5,980
Mint color tourmaline 0.229ct loose
Sale price¥5,980
Pink tourmaline 0.205ct loose
Sale price¥5,980
Bicolor sapphire from Madagascar 0.252ct loose
Sale price¥14,800
Bicolor sapphire from Madagascar 0.265ct loose
Sale price¥16,800
Bicolor sapphire from Madagascar 0.259ct loose
Sale price¥9,800
Bicolor sapphire from Madagascar 0.293ct loose
Sale price¥18,800
Bicolor sapphire from Madagascar 0.198ct loose
Sale price¥9,800
Bicolor sapphire from Madagascar 0.212ct loose
Sale price¥9,800
Mexican water opal 0.212ct loose (contrarus opal)
Sale price¥39,800
Yellow sapphire from Sri Lanka 0.222ct loose
Sale price¥12,800
[Koshu precious stone Kiriko plusthree] Rubellite 1.809ct loose
Sale price¥39,800
[Koshu precious stone Kiriko plusthree] Green tourmaline 1.880ct loose
Sale price¥35,800
Brazilian Trapichea Amethyst 24.772ct loose with patch
Sale price¥8,800
Tourmaline cat's eye 0.910ct loose
Sale price¥6,980
Opal 6mm/0.595ct loose (rose cut)
Sale price¥9,800
Citrine 0.833ct loose stone
Sale price¥3,980
Brazilian citrine 1.216ct loose stone
Sale price¥4,980
Brazilian citrine 1.250ct loose stone
Sale price¥5,980
Amethyst 8.044ct loose
Sale price¥6,980
Aquamarine cat's eye 3.528ct loose
Sale price¥5,980
Unheated silky pink sapphire from Vietnam 0.197ct loose
Sale price¥12,800
Unheated silky pink sapphire from Vietnam 0.247ct loose
Sale price¥12,800
Star garnet 14.400ct loose
Sale price¥11,000
Star garnet 14.600ct loose
Sale price¥11,000
Russian demantoid garnet (horsetail recognized) 6.3mm/1.058ct loose
Sale price¥398,000
Russian demantoid garnet (horsetail recognized) 3.7mm/0.231ct loose
Sale price¥22,800
Russian demantoid garnet (horsetail recognized) 3.8mm/0.232ct loose
Sale price¥18,800
Pink tourmaline 9.954ct loose
Sale price¥49,800
Unheated silky pink sapphire from Vietnam 0.175ct loose
Sale price¥7,980
[Rouge cut] Almandine garnet 4.632ct loose
Sale price¥15,800
[Rouge cut] Almandine garnet 3.214ct loose
Sale price¥15,800
[Rouge cut] Almandine garnet 2.661ct loose
Sale price¥12,800
Diamond 0.051ct loose (trapeze cut, VS class equivalent)
Sale price¥9,800
Diamond 0.777ct loose (butterfly cut)
Sale price¥77,777
Mexican cantera opal 12.610ct loose
Sale price¥29,800
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.