Lepidocrocite in quartz 0.308ct loose
Sale price¥6,980
Medusa Quartz (Paraiba Quartz) 1.855ct loose
Sale price¥18,800
Lepidocrocite in quartz 1.087ct loose
Sale price¥5,980
Tibetan bicolor andesine 2.657ct loose stone
Sale price¥19,800
Mica in Quartz 0.594ct loose stone
Sale price¥5,980
Yellow sapphire 0.229ct loose stone
Sale price¥8,800
Rhodochrosite from Detroit City, USA 3.2mm/0.150ct loose stone
Sale price¥19,800
Rhodochrosite from Detroit City, USA 3.1mm/0.154ct loose stone
Sale price¥19,800
Sri Lankan Ilmenite in Star Sapphire 3.426ct loose stone (Ratnapura)
Sale price¥49,800
Vietnam unheated silky pink sapphire 0.580ct loose stone
Sale price¥12,800
Brazilian Indicolite Tourmaline 0.352ct Loose Stone with Certification
Sale price¥29,800
Ruby 0.528ct Loose Stone with Gem Identification Report
Sale price¥28,800
Diamond 0.042ct loose (VS class equivalent, emerald cut)
Sale price¥6,980
Violet spinel 0.642ct loose
Sale price¥6,980
Violet spinel 0.472ct loose
Sale price¥8,800
[On sale May 2nd at 10 PM JST] K18 Peridot Chain Ring
Sale price¥22,800
[On sale May 2nd at 10 PM JST] K18 Aquamarine Chain Ring
Sale price¥24,800
[On sale May 2nd at 10 PM] K18 Amethyst Chain Ring
Sale price¥18,800
![[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)
![[On Sale May 2 at 10 PM] Ruby 0.286ct Loose Gemstone with Identification Report](http://store.karatz.jp/cdn/shop/files/P2197889_4020ad31-fba6-4c2b-94c0-ba3f34311857.jpg?v=1774485888&width=2690)
![[On Sale 5/2 at 10 PM JST] Mozambique Almandine Garnet 17.770ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P4280440_439047ed-a834-4be6-9f39-a571d776b5a4.jpg?v=1777642230&width=3296)
[On sale May 2nd at 10 PM JST] Mexican Cantera Opal 27.410ct Loose Stone
Sale price¥25,800
[On sale at 10 PM on May 2nd] Mexican Cantera Opal 32.560ct Loose Stone
Sale price¥29,800
![[On sale May 2nd at 10 PM] Lazurite from Pakistan 0.150ct Loose Stone with Certificate](http://store.karatz.jp/cdn/shop/files/P4232123_3bbf38cd-fb20-498e-bfa3-32002525eaa3.jpg?v=1777642989&width=2451)
![[Sales Start: May 3rd, 10 PM JST] [Colorflee] Pt900 Lab-Grown Ruby 1.61ct / Diamond 0.25ct Ring (Central Gem Lab Certified)](http://store.karatz.jp/cdn/shop/files/P4280341_b8b31c08-1f05-484d-96e2-43692e4a6934.jpg?v=1777643817&width=2444)
![[On sale May 3rd at 10 PM] Pink Diamond 0.137ct Loose (FANCY DEEP BROWNISH PINK, I-1)](http://store.karatz.jp/cdn/shop/files/32501866_02.jpg?v=1775722654&width=1200)
![[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)
![[Sale May 3rd, 10 PM] [Colorful] Pt900 Diamond 0.5ct Ring with Appraisal Report](http://store.karatz.jp/cdn/shop/files/collage_df3cb11b-0df3-4814-8f71-b19810da427c.png?v=1777681819&width=2250)
![[On sale May 4th, 10 PM JST] Bicolor Benitoite from USA, 0.624 ct loose stone with鑑別書](http://store.karatz.jp/cdn/shop/files/P4146107_bde5edf5-3b59-499c-9f77-602154ca5a17.jpg?v=1777685262&width=2873)
![[On sale 5/4 at 10 PM] Colombian bicolor emerald 0.274ct loose stone](http://store.karatz.jp/cdn/shop/files/P9183956_25a7a6b1-a220-4cf8-a400-be021fcbc2aa.jpg?v=1777685820&width=4000)
[On sale 5/4 at 10 PM] Colombian bicolor emerald 0.274ct loose stone
Sale price¥98,000
![[Sales start 10:00 PM on May 4th] Colombian non-oil emerald (NONE) 0.060ct loose GIA](http://store.karatz.jp/cdn/shop/files/PC220238_2d3f6e8d-8516-4c46-bba2-f287e5941b46.jpg?v=1777686131&width=3224)
[On Sale May 3, 10 PM JST] Australian Black Opal 0.385ct Loose Gemstone
Sale price¥18,800
[On sale May 3, 10 PM JST] Australian Black Opal 0.667ct Loose Stone
Sale price¥12,800
[On sale May 3rd, 10 PM JST] Australian Black Opal Loose Stone 0.529ct
Sale price¥15,800
![[Sale on May 4th at 10 PM] Madagascar Grandidierite 0.086ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P4073966_029012b1-2195-49be-997e-1e393d3778db.jpg?v=1777760660&width=2634)
[Sale on May 4th at 10 PM] Madagascar Grandidierite 0.086ct Loose Stone
Sale price¥17,800
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.