Birthstone list
Pink tourmaline 0.394ct loose
Sale price¥8,800
Pink sapphire 0.225ct loose
Sale price¥6,980
Tanzanite 0.449ct loose
Sale price¥6,980
Rhodolite garnet 0.990ct loose
Sale price¥5,980
Amazon green opal 1.120ct loose
Sale price¥5,980
YAG (Yttrium Aluminum Garnet) 7mm/1.775ct Loose Stone
Sale price¥12,800
Paraiba tourmaline from Mozambique 0.388ct loose
Sale price¥24,800
Paraiba tourmaline from Mozambique 0.272ct loose
Sale price¥15,800
Paraiba tourmaline from Mozambique 0.596ct loose
Sale price¥29,800
Paraiba tourmaline from Mozambique 0.273ct loose
Sale price¥18,800
Paraiba tourmaline from Mozambique 0.228ct loose
Sale price¥12,800
Paraiba Tourmaline from Mozambique 2.037ct loose stone with gem analysis
Sale price¥598,000
Australian boulder opal 3.695ct loose
Sale price¥15,800
Australian boulder opal 1.552ct loose
Sale price¥12,800
Sri Lankan star sapphire 1.487ct loose
Sale price¥12,800
Unheated Ruby from Myanmar 0.433ct Ruth Japanese-German Edition
Sale price¥59,800
Australian boulder opal 2.470ct loose
Sale price¥8,800
Australian boulder opal 4.729ct loose
Sale price¥19,800
Aventurine Aquamarine Cat's Eye 1.567ct Loose
Sale price¥5,980
Bicolor tanzanite 0.479ct loose
Sale price¥24,800
Russian demantoid garnet (horsetail recognized) 5.2mm/0.702ct loose
Sale price¥228,000
Pink tourmaline 0.516ct loose
Sale price¥6,980
Pink tourmaline 4.0mm/0.300ct loose stone
Sale price¥6,980
Mexican Fire Opal 1.150ct Loose
Sale price¥39,800
Colombian pyrite in emerald 4.592ct loose
Sale price¥128,000
Sapphire 0.676ct loose (color shift)
Sale price¥16,800
Green sapphire 0.518ct loose (teal green)
Sale price¥9,800
Color change sapphire 0.946ct loose
Sale price¥39,800
Pink sapphire from Mozambique 0.213ct loose (hot pink sapphire)
Sale price¥14,800
Paraiba tourmaline from Mozambique 0.243ct loose
Sale price¥19,800
Unheated silky pink sapphire from Vietnam 0.426ct loose
Sale price¥18,800
Brazilian bicolor tourmaline 1.554ct loose (tricolor tourmaline)
Sale price¥25,800
Montana Sapphire 3mm/0.155ct loose
Sale price¥23,800
Myanmar trapichel ruby 0.179ct rough stone
Sale price¥3,980
Myanmar trapichel ruby 0.160ct rough stone
Sale price¥5,980
Trapichel ruby from Myanmar 0.231ct rough stone
Sale price¥5,980
Myanmar trapichel ruby 0.152ct rough stone
Sale price¥4,980
Trapichel ruby from Myanmar 0.202ct rough stone
Sale price¥3,980
Myanmar trapichel ruby 0.261ct rough stone
Sale price¥4,980
Madeira Citrine 7mm/0.938ct loose
Sale price¥5,980
Yellow Diamond 3mm/0.111ct Loose (FANCY VIVID ORANGY YELLOW, SI-2)
Sale price¥45,800
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.