![Limited Edition of 11: Two Koshu Kiriko plusthree stones (average 18 carats) with one Dendritic Quartz Gacha (with one Copper Rutile in Quartz) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_3ad725c9-c6ee-4442-97de-622610f35fbb.png?v=1755304224&width=2000)
![[On Sale at 10 PM on September 5th] [Limited to 6 stones] 1 Unheated Sri Lankan Sapphire Loose with Silk Inclusions (Average 0.31ct) [Multiple Purchase Discounts Available]](http://store.karatz.jp/cdn/shop/files/P1010278.jpg?v=1756866383&width=4000)
![[On sale at 10 PM on September 6th] [Limited to 6 stones] 1 loose unheated sapphire from Sri Lanka (average 0.77 carats) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010228_5399409f-afc5-4b03-b9cb-686160deb62e.jpg?v=1756866456&width=4000)
Kenyan gold sheen sapphire 2.2mm/0.052ct loose
Sale price¥8,800
Bicolor sapphire 0.856ct loose
Sale price¥18,800
Unheated sapphire 2.430ct loose GIA
Sale price¥298,000
Purple sapphire 0.313ct loose
Sale price¥6,980
Purple sapphire 0.220ct loose
Sale price¥3,980
Purple sapphire 0.240ct loose
Sale price¥4,980
Rough diamond (makeable) 0.353ct loose
Sale price¥25,800
Rough diamond (makeable) 0.279ct loose
Sale price¥25,800
[On sale at 10pm on August 25th] Zambian emerald 0.166ct loose stone
Sale price¥8,800
Bicolor sapphire 0.334ct loose
Sale price¥9,800
Bicolor sapphire 0.149ct loose
Sale price¥6,980
Bicolor sapphire 0.323ct loose
Sale price¥9,800
Diamond 0.054ct loose (VS class equivalent, emerald cut)
Sale price¥8,800
Colombian emerald cat's eye 0.112ct loose
Sale price¥9,800
Colombian emerald cat's eye 0.094ct loose
Sale price¥8,800
Colombian emerald cat's eye 0.093ct loose
Sale price¥8,800
White sapphire 0.537ct loose
Sale price¥15,800
White sapphire 0.464ct loose
Sale price¥9,800
White sapphire 0.418ct loose
Sale price¥12,800
Yellow sapphire 0.385ct loose
Sale price¥9,800
White sapphire 0.364ct loose
Sale price¥9,800
White sapphire 0.271ct loose
Sale price¥7,980
White sapphire 0.212ct loose
Sale price¥6,980
White sapphire 4.5mm/0.462ct loose
Sale price¥9,800
White sapphire 4.5mm/0.414ct loose
Sale price¥12,800
White sapphire 0.338ct loose
Sale price¥9,800
Opal 6.560ct loose
Sale price¥39,800
[Posted 12533051] Cantera Opal 8.970ct Loose
Sale price¥12,800
Cantera Opal 5.750ct loose
Sale price¥18,800
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.