Birthstone list
Tanzanian Dragon Garnet 0.746ct Loose Stone
Sale price¥17,800
Diamond (cabochon cut) 0.196ct loose
Sale price¥29,800
Brazilian green tourmaline 0.541ct loose stone
Sale price¥4,980
Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.708ct Loose Stone
Sale price¥15,800
0.400ct Madagascar Pink Sapphire Loose (Heart Shape)
Sale price¥19,800
Mexican cantera opal 12.401ct loose
Sale price¥8,800
American Benitoite 0.100ct Loose Stone (Emerald Cut)
Sale price¥32,800
Russian demantoid garnet (horsetail recognized) 2.8mm/0.187ct loose
Sale price¥18,800
Russian demantoid garnet (horsetail recognized) 2.9mm/0.165ct loose
Sale price¥24,800
Sri Lankan tourmaline 4.860ct loose stone (cushion cut)
Sale price¥12,800
Mexican fire opal 6mm/0.698ct loose (rose cut)
Sale price¥14,800
Russian demantoid garnet (horsetail recognized) 4.5mm/0.423ct loose
Sale price¥69,800
Bicolor tourmaline 1.704ct loose
Sale price¥12,800
Bicolor tourmaline 1.440ct loose
Sale price¥9,800
Pink tourmaline 0.734ct loose
Sale price¥7,980
Pink tourmaline 1.011ct loose
Sale price¥8,800
Pink tourmaline 0.553ct loose
Sale price¥6,980
Pink tourmaline 0.506ct loose
Sale price¥5,980
Pink tourmaline 0.377ct loose
Sale price¥3,980
Colombian trapiche emerald (reverse trapiche) 0.101ct rough stone
Sale price¥12,800
[Koshu precious stone Kiriko plusthree] Citrine 1.137ct loose with patch
Sale price¥19,800
[Koshu precious stone cut plusthree] Citrine 0.962ct loose with patch
Sale price¥19,800
Pink tourmaline 0.915ct loose
Sale price¥7,980
Green tourmaline 0.305ct loose stone
Sale price¥3,980
Colombian oil-free emerald 0.535ct loose Japanese-German edition
Sale price¥248,000
Paraiba tourmaline 233.409ct raw stone from Brazil
Sale price¥12,800
Brazilian Paraiba tourmaline 181.342ct raw stone
Sale price¥9,800
0.095ct Brazilian Alexandrite Loose Stone (Emerald Cut)
Sale price¥35,800
Mexican cantera opal 8.454ct loose
Sale price¥3,980
Russian demantoid garnet (horsetail recognized) 3mm/0.138ct loose
Sale price¥19,800
[On sale at 10pm on August 15th] Sri Lankan Star Sapphire 2.062ct Loose
Sale price¥12,800
[8/16 22:00 Sale] Brazilian Aquamarine 0.259ct Loose Stone
Sale price¥6,980
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.
業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。
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.