![[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_68f24c59-ad99-43b4-bb8f-f7560aa7f246.png?v=1792134404&width=2000)
![[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/2026-10-1615.44.21.png?v=1792133085&width=1249)
![[Available 10/18 at 22:00] Brazilian Microlite 0.058ct Loose Gemstone with Identification Report](http://store.karatz.jp/cdn/shop/files/PA150177_5910b413-229d-4339-a3a6-1fb7af1786ea.jpg?v=1792069360&width=2739)
![[10/18 10:00 PM Release] Tanzanian Mandarin Garnet 4.5mm/0.529ct Loose Stone with Identification Report](http://store.karatz.jp/cdn/shop/files/PA161584_087bf08f-b8c4-4ad5-839e-853ddac9d8b6.jpg?v=1792157662&width=3280)
![[Available 10/18 at 10 PM] Ruby 0.185ct Loose Stone with Appraisal Report](http://store.karatz.jp/cdn/shop/files/PA150875_4600c571-0d42-4c35-a216-6d7c8c0da4fc.jpg?v=1792157766&width=2776)
![[10/21 (Wed) 10:00 AM Deadline: Lottery Sale] Bekily Blue Garnet (Color-Change Garnet) 1.026ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_a3461f04-4aae-4c5e-bcb1-7e987caf758f.png?v=1792194921&width=2000)
![[10/21 (Wed) 10:00 AM Deadline: Lottery Sale] Brazilian Alexandrite 0.210ct Loose Stone GIA](http://store.karatz.jp/cdn/shop/files/collage_e43b5b90-4340-4c2c-a637-624fe61c17c8.png?v=1792196281&width=2000)
![[Deadline: Wed, Oct 21, 10:00 AM: Lottery Sale] Indian Alexandrite 0.160ct Loose Stone GIA](http://store.karatz.jp/cdn/shop/files/collage_1b997220-feef-4af0-bbe4-6427f86d4e77.png?v=1792196494&width=2000)
![[Available 10/19 at 10 PM] [Color-Full] 18K Gold Mother-of-Pearl Cat Motif Pendant Top with 0.01ct Diamond (Includes Appraisal Report)](http://store.karatz.jp/cdn/shop/files/PA130352.jpg?v=1791962023&width=4000)
![[12560799 Listed] Brazilian Elestial Amethyst 0.819ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA142945_0d69cc72-f4a9-438e-af83-f398b225883b.jpg?v=1792122350&width=4000)
[12560799 Listed] Brazilian Elestial Amethyst 0.819ct Loose Stone
Sale price¥9,800
![[Item No. 12560796] Brazilian Elestial Amethyst 1.965ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA142921.jpg?v=1792122009&width=4000)
[Item No. 12560796] Brazilian Elestial Amethyst 1.965ct Loose Stone
Sale price¥18,800
![[12560786] Nigerian Green Beryl 0.621ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA142855.jpg?v=1792121929&width=4000)
[12560786] Nigerian Green Beryl 0.621ct Loose Stone
Sale price¥8,800
Mexican water opal loose stone 0.199ct
Sale price¥15,800
Brazilian Mint-Colored Tourmaline 0.294ct Loose Stone
Sale price¥15,800
Zambian Emerald 0.188ct Loose Stone
Sale price¥9,800
Mozambique Almandine Garnet 1.144ct Loose Stone
Sale price¥15,800
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.