![[On sale May 28th at 10 PM] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Vol. 4: Bungo Ring [Takiji Kobayashi Model Ring]](http://store.karatz.jp/cdn/shop/files/bungou_pt4_bnr_03c_1080x1080_3452dba7-b9d7-4d95-805d-90a51ce343fa.jpg?v=1779787564&width=1080)
Non-Oil Emerald 1.370ct Loose GIA
Sale price¥1,580,000
Colombian oil-free emerald 0.310ct loose stone
Sale price¥298,000
![[On sale May 28th, 10 PM] Adult Cbonstar Jewelry Vol. 3: Adult Cbonstar Pendant Mirage Edition <silver model></silver>](http://store.karatz.jp/cdn/shop/files/P8061894.jpg?v=1761201097&width=4000)
Solo "Simple Order Ring Setting"
Sale priceFrom ¥79,800
![[Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}](http://store.karatz.jp/cdn/shop/files/bungou_pt2_bnr_01_1080x1080_137526cc-4d14-414f-8146-aef7dd597625.jpg?v=1747362836&width=1080)
![[Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}](http://store.karatz.jp/cdn/shop/files/bungou_pt2_bnr_03_1080x1080_4ae0e7b4-416f-461b-b8f9-62a4548c4f0a.jpg?v=1747362865&width=1080)
![[On sale May 28th at 10 PM] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Part 3: Bungo Ring [Sakunosuke Oda Model]](http://store.karatz.jp/cdn/shop/files/01.jpg?v=1764723334&width=1080)
![[Sales End on November 15th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model] {Almandine Garnet, Yellow Diamond}](http://store.karatz.jp/cdn/shop/files/bungou_pt2_bnr_02_1080x1080_495f7ddb-bc4f-423e-a92a-d46753ed2f60.jpg?v=1747362846&width=1080)
Andromeda "Semi-custom pendant frame and chain integrated"
Sale price¥105,800
Duo (Simple Order Ring Frame)
Sale price¥105,800
![[Sales start May 28th, 10 PM] Adult Sebonstar Jewelry Vol. 3: Charmy Pact Ring Precious Model (Platinum/Gold) Pt950/K18YG/K18PG](http://store.karatz.jp/cdn/shop/files/PA067498_085f46a8-30f9-4c0a-aa5b-ba86eb8620de.jpg?v=1762304991&width=4000)
![[On sale May 28th, 10 PM] Adult Sebonstar Jewelry Vol. 3: Heart Key Lock Pendant Precious Model (Platinum/Gold) Pt950/K18YG/K18PG](http://store.karatz.jp/cdn/shop/files/PA078307_2123680b-0e41-4868-a4e8-0d3379cedcc5.jpg?v=1762298053&width=4000)
![[Sales End on Monday, June 30th] "Bungo and Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Izumi Kyoka Model]](http://store.karatz.jp/cdn/shop/files/bungou_pt_bnr_03_1080x1080_ae440665-0722-4452-9979-2d399c01e85f.jpg?v=1747649128&width=1080)
Brazilian Paraiba Tourmaline Ring and Half Eternity Ring Set (1.2mm)
Sale price¥198,000
![[Sales End on Monday, June 30th] "Bungo to Alchemist" x KARATZ Collaboration Jewelry Bungo Ring [Dazai Osamu Model]](http://store.karatz.jp/cdn/shop/files/bungou_pt_bnr_01_1080x1080_2c12d88c-a968-40b6-b9d3-53dda0ee3890.jpg?v=1747649147&width=1080)
13-stone diamond half eternity ring set (VS class, D-G color, H&C, 2.0mm)
Sale price¥158,000
Ainsel "Semi-custom ring setting"
Sale price¥178,000
![[On sale May 3rd at 10 PM] Afghan Kunzite (Lilac Pink) 49.724ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/12562635_003.jpg?v=1775723129&width=1200)
![[On sale May 5 at 10 PM] Untreated Sri Lankan Sapphire (Glass Body/Sapphire Crystal) 142.434 ct Rough with Certification](http://store.karatz.jp/cdn/shop/files/P1305718_0f25521f-68a8-45da-9c82-fe4b7c3ff2d0.jpg?v=1777594543&width=4000)
Benitoite 0.231ct loose
Sale price¥220,000
Benitoite 0.286ct loose
Sale price¥258,000
Benitoite 0.272ct loose stone (emerald cut)
Sale price¥248,000
K18/Pt950 Afghanistan Green Apatite 0.162ct Ring
Sale price¥158,000
Burmese ruby 3.72ct loose GIA/CGL
Sale price¥298,000
【Karafuri】Pt900 Cantera Opal 7.809ct and Diamond 0.19ct Pendant Top
Sale price¥110,000
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.