![[On sale 3/7 at 10pm] 18K Yellow Gold Colombian Emerald Ring](http://store.karatz.jp/cdn/shop/files/P1077473.jpg?v=1768619542&width=4000)
[On sale 3/7 at 10pm] 18K Yellow Gold Colombian Emerald Ring
Sale price¥128,000
![[Available at 10 PM on March 7th] 18K Yellow Gold Ruby Ring (Pigeon Blood Color)](http://store.karatz.jp/cdn/shop/files/P1077442.jpg?v=1772750656&width=4000)
Brazilian Medusa Quartz (Paraiba Quartz) 2.484ct loose stone
Sale price¥29,800
Brazilian Quartz in Quartz 14.298ct Loose Stone
Sale price¥19,800
Dioptase from Namibia 0.150ct loose Japanese-German book
Sale price¥49,800
Blue Tourmaline 1.460ct Loose Stone Japan-Germany Exchange
Sale price¥39,800
Blue Garnite from Nigeria 0.514ct Ruth Japanese-German Edition
Sale price¥45,800
YAG (Yttrium Aluminum Garnet) 7.1mm/1.927ct Loose Stone by Nikkei Kan
Sale price¥12,800
Bicolor Tourmaline 0.649ct Loose Stone, Japan-Germany
Sale price¥12,800
Unheated Bicolor Paraiba Tourmaline 0.092ct Loose GIA
Sale price¥188,000
South African rhodochrosite 2.477ct loose Japanese-German edition
Sale price¥398,000
Bicolor Paraiba tourmaline 2.477ct loose DGL version
Sale price¥298,000
Mexican bicolor Danburite 1.932ct loose stone by Nikkei
Sale price¥29,800
Australian rainbow lattice sunstone 0.378ct loose
Sale price¥4,980
Australian rainbow lattice sunstone 0.498ct loose
Sale price¥2,980
Australian rainbow lattice sunstone 0.449ct loose
Sale price¥4,980
Australian rainbow lattice sunstone 0.354ct loose
Sale price¥4,980
Australian rainbow lattice sunstone 0.353ct loose
Sale price¥4,980
[Clover in cut] Emerald 9mm/2.498ct {Collaboration} Loose with patch
Sale price¥69,800
[On Sale 3/7 at 10pm] Brazilian Dendritic Quartz 8.598ct Loose Stone
Sale price¥19,800
[On Sale 3/7 at 10pm] Brazilian Dendritic Quartz 4.182ct Loose Stone
Sale price¥12,800
[12562078] Oregon Sunstone from the United States, 0.820ct Loose
Sale price¥16,800
[On Sale 3/7 at 10pm] Oregon Sunstone from the USA, 7.2mm/1.334ct Loose
Sale price¥29,800
![[On Sale at 10 PM on March 7th] Synthetic Alexandrite 4.3mm/0.430ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_36a26dac-4236-491c-b16c-549e3b56c2e0.png?v=1772852146&width=2250)
![[On Sale at 10 PM on March 7th] Tanzanite from Tanzania 0.416ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P3038608_02fbd2ab-e481-45df-87f2-9ef1683f93b5.jpg?v=1772844395&width=2814)
![[On Sale 3/7 at 10pm] Madagascar Blue Sapphire 0.347ct Loose Stone with Certificate of Authenticity](http://store.karatz.jp/cdn/shop/files/P3027595_b2f0efc9-dd2b-43f1-8c21-06f190c960b7.jpg?v=1772845187&width=2923)
![[On Sale 3/7 at 10pm] Synthetic Cobalt Spinel 0.831ct Loose Stone with Certificate of Authenticity](http://store.karatz.jp/cdn/shop/files/P3027720_1315f284-15f3-44eb-8974-663b6e90652e.jpg?v=1772851820&width=2978)
![[On sale 3/7 at 10pm] 18K Yellow Gold Brazilian Pink Imperial Topaz 0.909ct Diamond Ring, Japan-Germany Qualification](http://store.karatz.jp/cdn/shop/files/PC051925.jpg?v=1765517941&width=4000)
![[On Sale 3/7 at 10pm] Zimbabwe Green Diamond Rough (Sawable) 0.428ct Rough with Trigon](http://store.karatz.jp/cdn/shop/files/P1210028_8b78668d-0ccf-41ed-b512-a778be22b5c8.jpg?v=1772575933&width=2764)
![[On Sale 3/7 at 10pm] 18K Yellow Gold Ring with Russian Demantoid Garnet (Horsetail Certified) 0.141ct and Myanmar Spinel](http://store.karatz.jp/cdn/shop/files/P1077619.jpg?v=1772576002&width=4000)
![[On sale 3/7 at 10pm] South African Rhodochrosite 1.820ct Loose Stone](http://store.karatz.jp/cdn/shop/files/20260201_P2047493_3ee24cfb-4307-4b29-a821-5473292118cd.jpg?v=1771020392&width=3135)
[On sale 3/7 at 10pm] South African Rhodochrosite 1.820ct Loose Stone
Sale price¥128,000
Brazilian Paraiba tourmaline in quartz 1.602ct loose
Sale price¥39,800
Australian rainbow lattice sunstone 0.587ct loose
Sale price¥4,980
Australian shell opal 53.277ct rough stone
Sale price¥59,800
Watermelon tourmaline 3.403ct loose
Sale price¥3,980
Auinite 2.3mm/0.060ct loose
Sale price¥6,980
Auinite 2.6mm/0.084ct loose
Sale price¥8,800
Auinite 2.4mm/0.064ct loose
Sale price¥8,800
Bicolor Sphalerite 9.8mm/4.517ct loose
Sale price¥69,800
Pink diamond 0.030ct loose (FANCY PURPLE PINK, SI2)
Sale price¥29,800
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.