American Ceylanite 2.666ct Loose Stone with Certification
Sale price¥15,800
[12550887] Paraiba Tourmaline from Mozambique 0.784ct loose stone
Sale price¥128,000
[Updated 12552163] Benitoite 0.099ct loose stone
Sale price¥29,800
Colombian mint color emerald 0.297ct loose stone
Sale price¥8,800
Sri Lankan cobalt spinel 0.281ct loose stone
Sale price¥55,800
Unheated Ruby, 0.207 ct, Loose Stone, Hōki Kyō
Sale price¥69,800
Ceylon ice blue sapphire, 1.134 ct, loose, with gemological report
Sale price¥45,800
Tanzanian Kornerupine 0.212ct loose stone
Sale price¥19,800
Tanzanian Rhodolite Garnet 0.448ct Loose Stone
Sale price¥6,980
Sri Lankan Yellow Sapphire 0.349ct Loose
Sale price¥12,800
Brazilian Euclase 0.289ct loose stone
Sale price¥12,800
0.416ct Loose Mozambique Ruby with Gemstone Identification Report
Sale price¥29,800
Paraiba tourmaline from Brazil 0.086ct loose
Sale price¥79,800
Diamond 0.229ct Loose (D, VS2, Flanders Cut)
Sale price¥39,800
Diamond 3.0mm/0.100ct Loose (E, VVS-2, VeryGood)
Sale price¥22,800
[Published 12562264] Brazilian Lazulite 0.048ct Loose
Sale price¥36,800
[Item 12563407] Afghan Green Hauyne 0.075ct Loose Stone
Sale price¥29,800
[Listing 12563380] Unset 1.077ct Tanzanian Zircon
Sale price¥12,800
[Listed as 22602651] [Colorful] K9 Ruby Pendant Top (Necklace Top)
Sale price¥19,800
[Listing No. 12563397] Brazilian Alexandrite 0.217 ct Loose Stone
Sale price¥39,800
[22602667 Posted] [Colorful] Pt900 Hauyne 0.035ct Ring
Sale price¥89,800
[Published on 12563087] Unheated Ruby 0.216ct Loose Stone
Sale price¥59,800
[22602668 listed] [Colorful] K18 Tanzanite 0.25ct Ring
Sale price¥79,800
[Listed as 12563489] Sri Lankan Blue Sapphire 0.636 ct Loose Stone
Sale price¥39,800

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.














































![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_929a4a93-f188-41ad-a98e-a95f5bd0d2f7.png?v=1786169886&width=2000)
![[On Sale 10 PM, June 7] *Limited to 3 Sets* 1.0ct/D/VS-VVS/IDEAL Lab-Grown Diamond (Synthetic Diamond) & 2 Rare Cabochon Stones (Total of 3 Stones Included) *Multiple Purchase Discount Available*](http://store.karatz.jp/cdn/shop/files/collage_ee8309d3-5bb0-4cb8-b162-fd9ce98dae4e.png?v=1785924238&width=4000)
![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/2026-08-0914.54.51.png?v=1786254915&width=1346)


