Birthstone list
Myanmar trapichel ruby 0.152ct rough stone
Sale price¥4,980
Trapichel ruby from Myanmar 0.231ct rough stone
Sale price¥5,980
Myanmar trapichel ruby 0.160ct rough stone
Sale price¥5,980
Myanmar trapichel ruby 0.179ct rough stone
Sale price¥3,980
Montana Sapphire 3mm/0.155ct loose
Sale price¥23,800
Brazilian bicolor tourmaline 1.554ct loose (tricolor tourmaline)
Sale price¥25,800
Unheated silky pink sapphire from Vietnam 0.426ct loose
Sale price¥18,800
Paraiba tourmaline from Mozambique 0.243ct loose
Sale price¥19,800
Pink sapphire from Mozambique 0.213ct loose (hot pink sapphire)
Sale price¥14,800
Color change sapphire 0.946ct loose
Sale price¥39,800
Green sapphire 0.518ct loose (teal green)
Sale price¥9,800
Sapphire 0.676ct loose (color shift)
Sale price¥16,800
Colombian pyrite in emerald 4.592ct loose
Sale price¥128,000
Mexican Fire Opal 1.150ct Loose
Sale price¥39,800
Pink tourmaline 4.0mm/0.300ct loose stone
Sale price¥6,980
Pink tourmaline 0.516ct loose
Sale price¥6,980
Russian demantoid garnet (horsetail recognized) 5.2mm/0.702ct loose
Sale price¥228,000
Bicolor tanzanite 0.479ct loose
Sale price¥24,800
Aventurine Aquamarine Cat's Eye 1.567ct Loose
Sale price¥5,980
Australian boulder opal 4.729ct loose
Sale price¥19,800
Australian boulder opal 2.470ct loose
Sale price¥8,800
Unheated Ruby from Myanmar 0.433ct Ruth Japanese-German Edition
Sale price¥59,800
Sri Lankan star sapphire 1.164ct loose
Sale price¥12,800
Sri Lankan star sapphire 1.487ct loose
Sale price¥12,800
Australian boulder opal 1.552ct loose
Sale price¥12,800
Australian boulder opal 3.695ct loose
Sale price¥15,800
Paraiba Tourmaline from Mozambique 2.037ct loose stone with gem analysis
Sale price¥598,000
Paraiba tourmaline from Mozambique 0.228ct loose
Sale price¥12,800
Paraiba tourmaline from Mozambique 0.273ct loose
Sale price¥18,800
Paraiba tourmaline from Mozambique 0.596ct loose
Sale price¥29,800
Paraiba tourmaline from Mozambique 0.272ct loose
Sale price¥15,800
Paraiba tourmaline from Mozambique 0.388ct loose
Sale price¥24,800
YAG (Yttrium Aluminum Garnet) 7mm/1.775ct Loose Stone
Sale price¥12,800
Amazon green opal 1.120ct loose
Sale price¥5,980
Rhodolite garnet 0.990ct loose
Sale price¥5,980
Tanzanite 0.449ct loose
Sale price¥6,980
Pink sapphire 0.225ct loose
Sale price¥6,980
Pink tourmaline 0.394ct loose
Sale price¥8,800
Australian opal 0.286ct loose
Sale price¥6,980
[Camellia cut] Opal 14mm/5.283ct loose with patch
Sale price¥98,000
[Rouge cut] Almandine garnet 2.076ct loose
Sale price¥12,800
[Rouge cut] Almandine garnet 2.090ct 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.
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.