Paraiba tourmaline from Brazil 0.132ct loose (CuO:2.1%.MnO:2.2%)
Sale price¥188,000
American benitoite 0.069ct loose
Sale price¥19,800
South African yellow diamond (makeable) 0.202ct rough stone
Sale price¥15,800
South African gray diamond (makeable) 0.169ct rough stone
Sale price¥14,800
![[On sale at 10pm on January 21st] Tanzanite from Tanzania 0.467ct loose stone](http://store.karatz.jp/cdn/shop/files/PC052685_86d77fee-5916-4226-85f9-fb6b8067edb4.jpg?v=1768878572&width=2561)
![[On Sale at 10 PM on January 21st] Tanzanite from Tanzania 0.436ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PC052723_f3d01ab6-8f8c-4558-a15e-96c2758ed7b1.jpg?v=1765587394&width=2909)
![[On Sale at 10 PM on January 28th] Madagascar Grandidierite 0.228ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P1010888_da7d4774-be38-4591-a473-cf3d1fd1f4c3.jpg?v=1769480881&width=3284)
![[On Sale at 10 PM on January 20th] 0.257ct Unheated Silky Pink Sapphire from Vietnam](http://store.karatz.jp/cdn/shop/files/P1149629.jpg?v=1768773538&width=4000)
Mangano tantalite from Afghanistan 0.233ct loose
Sale price¥39,800
Sphene from Madagascar 0.498ct loose
Sale price¥6,980
American red beryl 0.143ct loose
Sale price¥15,800
American red beryl 0.115ct loose
Sale price¥12,800
American red beryl 0.208ct loose
Sale price¥22,800
American red beryl 0.141ct loose
Sale price¥14,800
Diamond 0.120ct loose (G, VS2, Excellent H&C)
Sale price¥25,800
Cambodian Blue Zircon 0.205ct Loose
Sale price¥3,980
Cambodian Blue Zircon 0.204ct Loose
Sale price¥3,980
Cambodian Blue Zircon 0.221ct Loose
Sale price¥3,980
Paraiba tourmaline from Mozambique 0.270ct loose
Sale price¥18,800
Paraiba tourmaline from Brazil 0.066ct loose
Sale price¥18,800
![[On Sale at 10 PM on January 14th] American Benitoite 0.257ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P9194879_e20a24ed-de0d-4a74-af90-af31a20e1607.jpg?v=1768278433&width=3213)
[On Sale at 10 PM on January 14th] American Benitoite 0.257ct Loose Stone
Sale price¥158,000
![[On Sale at 10 PM on January 12th] 0.466ct Sawable Diamond Rough Stone (with Trigon)](http://store.karatz.jp/cdn/shop/files/P1088079.jpg?v=1768172012&width=4000)
![[On sale at 10pm on 1/12] Diamond rough (makeable) 0.204ct rough](http://store.karatz.jp/cdn/shop/files/P1088037.jpg?v=1768086585&width=4000)
[On sale at 10pm on 1/12] Diamond rough (makeable) 0.204ct rough
Sale price¥39,800
![[1/11 22:00 Sale] Brazilian Dumortierite in Quartz 0.382ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P1088465_f43d3e40-29aa-4624-a2a1-c6d1634e73e3.jpg?v=1767942646&width=3570)
![[Available at 10 PM on January 10th] Cornflower Blue Sapphire 4.5mm/0.430ct Loose Stone AIGS](http://store.karatz.jp/cdn/shop/files/P8214781_694819ef-19a1-4c6b-b218-44465e22231f.jpg?v=1767738514&width=2618)
![[On Sale at 10 PM on January 9th] Brazilian Indigolite Tourmaline 0.421ct Loose Stone with Certificate of Authenticity](http://store.karatz.jp/cdn/shop/files/P8214968_5efc3821-63a5-458b-ad37-e6ff348a5599.jpg?v=1767738401&width=3143)
![[On Sale at 10 PM on January 8th] Colombian Emerald 0.091ct Loose](http://store.karatz.jp/cdn/shop/files/P8295775_e8a25644-3f7e-4f35-b74b-ff2fdb5bf22b.jpg?v=1767706799&width=2349)
[On Sale at 10 PM on January 8th] Colombian Emerald 0.091ct Loose
Sale price¥15,800
![[On Sale at 10 PM on January 6th] Mexican Water Opal (Faceted) 0.215ct Loose (Contralus Opal)](http://store.karatz.jp/cdn/shop/files/PC043015_5b1ccc8f-4878-4de6-825d-afb89bf60c71.jpg?v=1767484572&width=3310)
Grandidierite from Madagascar 0.167ct loose stone
Sale price¥39,800
Pakistani Lazurite (Azurite) 0.171ct Loose Stone
Sale price¥49,800
Zimbabwean Euclase 2.2mm/0.065ct Loose Stone
Sale price¥14,800
Colombian emerald 3.3mm/0.131ct loose stone
Sale price¥25,800
![[1/5 22:00 Sale] Parasitic Peridot 0.241ct Loose Stone, Japan-Germany Qualification](http://store.karatz.jp/cdn/shop/files/PC250884_b83a5846-1751-4770-a616-3e92f08a6e06.jpg?v=1767400505&width=3248)
![[On Sale at 10 PM on January 9th] Brazilian Paraiba Tourmaline 0.361ct Loose Stone (CuO: 1.0%, MnO: 3.6%)](http://store.karatz.jp/cdn/shop/files/PC245589.jpg?v=1767700054&width=4000)
![[On Sale at 10 PM on January 9th] Brazilian Paraiba Tourmaline 0.115ct Loose Stone (CuO: 2.0%, MnO: 0.6%)](http://store.karatz.jp/cdn/shop/files/PC245631_90fc9d3c-b244-4683-a742-138336741bf6.jpg?v=1767700054&width=3010)
![[On Sale at 10 PM on January 1st] Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.183ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_291d3077-5f61-47a0-bfed-144d684da372.png?v=1767139156&width=2250)
![[1/1 10pm Sale] Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.189ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_dc13498b-2187-4699-a810-f567f7d435df.png?v=1767139156&width=2250)
![[On Sale at 10 PM on January 1st] Madagascar Bekiri Blue Garnet (Color Change Garnet) 0.221ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_3ce96f6b-64e2-48e0-a6ad-1a7b632e0f7c.png?v=1767139272&width=2250)
![[On sale at 10pm on January 9th] German Auchenite 0.083ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PC256256_68ef63bf-8696-4fde-911f-fe239bb6d250.jpg?v=1767700057&width=2434)
[On sale at 10pm on January 9th] German Auchenite 0.083ct Loose Stone
Sale price¥35,800
![[On Sale at 10 PM on January 9th] German Auchenite 2.7mm/0.076ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PC256187_5256348f-8261-4730-8318-9d6d8d109efc.jpg?v=1767700056&width=2577)
Indian Moonstone 5.0mm/0.474ct Loose Stone (Rose Cut)
Sale price¥6,980
American benitoite 0.097ct loose
Sale price¥24,800
American benitoite 0.101ct loose
Sale price¥25,800
American benitoite 0.127ct loose
Sale price¥28,800
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.