Birthstone list
Mexican Fire Opal (Faceted Cut) 0.934ct Loose
Sale price¥25,800
Mozambique Rhodolite Garnet 1.146ct Loose Stone
Sale price¥12,800
Pyrope Almandine Garnet 2.514ct Loose Stone
Sale price¥29,800
Australian black opal 0.544ct loose stone
Sale price¥18,800
Brazilian Sky Blue Topaz (untreated) 2.560ct loose stone
Sale price¥12,800
Sri Lankan Yellow Sapphire 0.474ct Loose
Sale price¥15,800
Brazilian unheated pink imperial topaz (sherry pink) 0.931ct loose stone
Sale price¥98,000
Madagascar Bicolor Sapphire 0.626ct Loose
Sale price¥29,800
Colombian mica in emerald 1.940ct loose
Sale price¥49,800
[Takeshi Yamamoto] Brazilian Ametrine 29.930ct loose stone
Sale price¥79,800
South African diamond rough stone 0.330ct
Sale price¥5,980
Sri Lankan Blue Sapphire 4.2mm/0.333ct Loose Stone
Sale price¥12,800
Mozambique Almandine Garnet 0.774ct Loose Stone
Sale price¥8,800
Mozambique Almandine Garnet 0.477ct Loose Stone
Sale price¥8,800
Mozambique Rhodolite Garnet 5.7mm/1.188ct Loose Stone
Sale price¥12,800
Mexican Cantera Opal 14.458ct loose stone (faceted cut)
Sale price¥14,800
Synthetic Opal 2.026ct Loose
Sale price¥19,800
Round Diamond 0.389ct Loose (Cabochon Cut)
Sale price¥39,800
Sri Lankan blue sapphire, 4.3mm/0.371ct, loose
Sale price¥12,800
Madagascar Blue Sapphire (Ice Blue) 0.694ct Loose
Sale price¥18,800
Madagascar pink sapphire 0.275ct loose stone
Sale price¥12,800
Madagascar Blue Sapphire (Ice Blue) 0.263ct Loose
Sale price¥12,800
Brazilian Paraiba Tourmaline in Quartz 7.9mm/1.133ct Loose Stone
Sale price¥22,800
Brazilian Paraiba Tourmaline in Quartz 1.530ct Loose Stone
Sale price¥29,800
Brazilian Paraiba Tourmaline in Quartz 3.046ct loose stone
Sale price¥45,800
Brazilian Paraiba Tourmaline in Quartz 4.3mm/0.292ct Loose Stone
Sale price¥12,800
Brazilian Paraiba Tourmaline in Quartz 4.5mm/0.328ct Loose Stone
Sale price¥12,800
Tanzania UV type bicolor tsavorite 0.947ct loose stone
Sale price¥39,800
Indian Star Garnet 13.260ct Loose Stone (6 Rows)
Sale price¥5,980
Synthetic Black Opal 5.013ct Loose
Sale price¥59,800
Sri Lankan Star Sapphire 7.976ct Loose
Sale price¥98,000
South African diamond rough stone 0.210ct
Sale price¥8,800
Madagascar Purple Sapphire 0.342ct Loose Stone
Sale price¥12,800
South African Diamond Rough (Sawable) 0.107ct Rough Trigon
Sale price¥42,800
Indian Star Garnet 11.440ct Loose Stone (6 Rows)
Sale price¥5,980
Mexican Fire Opal 1.320ct Loose
Sale price¥13,800
Sapphire 0.328ct loose stone
Sale price¥12,800
Sri Lankan Yellow Sapphire 0.318ct Loose
Sale price¥15,800
Sri Lankan Yellow Sapphire 0.349ct Loose
Sale price¥15,800
![[On sale from 22:00 on 5/1] Mali Garnet (Grossular/Andradite Garnet) 4.2mm/0.398ct Loose Stone with Certificate of Authenticity from the Republic of Mali](http://store.karatz.jp/cdn/shop/files/P3137639_0e3bd582-8297-4c0c-9bf5-09a61c159ace.jpg?v=1749163154&width=2881)
Brazilian Paraiba tourmaline 0.180ct raw stone (CuO:1.8%, MnO:0.1%)
Sale price¥12,800
Brazilian bicolor tourmaline 12.842ct loose
Sale price¥298,000
Mexican Hyalite Opal 4.9mm/0.348ct Loose
Sale price¥12,800
Mexican Hyalite Opal 6.9mm/1.134ct Loose
Sale price¥25,800
Mexican Hyalite Opal 6.1mm/0.652ct Loose Stone
Sale price¥25,800
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.