Under 1.0 ct

[On sale August 25th at 10 PM] Ruby loose stone, 0.268ct Sale price¥15,800

[Sale on August 27th at 10 PM] Synthetic Rutile 0.566ct Loose Stone Sale price¥9,800

[On sale August 27th at 10 PM JST] Russian Demantoid Garnet (Horsetail inclusion visible) 3.8mm/0.280ct Loose Sale price¥59,800

【Sales start: August 22nd, 10 PM JST】Tanzanian Mint Garnet 0.238ct Loose Stone Sale price¥12,800

[On sale August 22nd, 10 PM JST] Brazilian pink tourmaline 4.9mm/0.400ct loose stone, Hōki Kyō Sale price¥15,800

[On sale 8/22 at 10 PM] Mozambique Ruby 0.409ct Loose Stone (Houseki Kyo) Sale price¥18,800

[On sale August 22, 10 PM] Bi-Color Grossular Garnet from Kenya 0.278ct Loose Sale price¥12,800

【Sales start 8/22 10 PM JST】Bicolor Grossular Garnet from Kenya 0.906ct Loose Stone Sale price¥39,800

[On sale August 23rd at 10 PM] US Oregon Sunstone 6.0mm/ 0.729ct Loose Sale price¥18,800

[On sale August 27th at 10 PM] Sri Lankan green sapphire 0.354ct loose stone with certificate Sale price¥12,800

[On sale August 27th at 10 PM] Tanzanian spinel, 0.644ct loose stone (with needle inclusions) with a gemological report Sale price¥19,800

[On sale August 27 at 10 PM] Tanzanian Spinel 0.536ct Loose (with needle inclusions) - with appraisal report Sale price¥15,800

【12563130 Posted】 Nigerian CobaltGahnite 0.176ct Loose Sale price¥24,800

Zimbabwe Euclase 0.134ct Loose Sale price¥25,800

[Posted on 12563358] Jeremejevite from Namibia 0.150ct Loose Sale price¥37,800

【Listed as 12562263】Brazilian Santa Maria Aquamarine 0.348ct Loose Gemstone Sale price¥12,800

[12563388 listed] Dioptase from Brazil, 0.894ct loose stone Sale price¥22,800

[Listed as 12563271] Rough Diamond (Sawable) from South Africa, 0.353 ct Sale price¥128,000

[12563370 listed] Eucrite from Zimbabwe 0.083ct Loose Sale price¥18,800

[Listed as 12563455] Tanzanian Bi-color Grossular Garnet 0.801 ct Loose Stone Sale price¥19,800

【12563732 Posted】Tanzanian Red Spinel 0.177ct Loose Sale price¥35,800

[Listing 12563877] Afghan Green Hauyne 0.269ct Loose Sale price¥98,000

[Featured on 12563911] Colombian Pyrite and Mica in Emerald, 0.409ct Loose Gemstone Sale price¥32,800

[On sale 8/23 10 PM JST] Brazilian Apatite Cat's Eye from Rio Grande do Norte, 5.0mm/0.740ct Loose Stone with Certificate Sale price¥14,800

[On sale August 28th, 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 0.515ct Loose Gemstone with Certificate Sale price¥14,800

[Sale begins 8/28 at 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 0.431ct Loose Stone with Certification Sale price¥12,800

[On sale August 28th at 10 PM] Nigerian Indicolite Tourmaline 0.341ct Loose Gemstone with Certificate Sale price¥29,800

[On sale August 28, 10 PM] Nigerian Indicolite Tourmaline 0.340ct Loose Stone with Certificate Sale price¥29,800

[Sale on 8/28 at 10 PM] Nigerian Indicolite Tourmaline 0.242 ct Loose Stone with Certificate Sale price¥22,800

[Sale 8/28 10PM JST] Nigerian Indicolite Tourmaline 4.2mm/0.308ct Loose, with Certificate Sale price¥29,800

[Listed as 12563729] Brazilian Indicolite Tourmaline 0.389ct Loose Sale price¥38,800

[Listing #12563493] Sri Lankan Blue Sapphire 0.434ct Loose Gemstone Sale price¥22,800

[Listed as 12563733] Tanzania Red Spinel 0.241ct Loose Stone Sale price¥43,800

[Published as 12563759] Tanzanian Ayanad Spinel (Hot Pink Spinel) 0.181ct Loose Gemstone Sale price¥25,800

[Listed as 12563918] Sri Lankan Purple Sapphire 0.730ct Loose Stone Sale price¥55,800

Brazilian Alexandrite 0.105ct Loose Stone [Listed under 12563842] Sale price¥29,800

[Posted 12563878] Green Hauyne from Afghanistan, 0.222 ct Loose Stone Sale price¥79,800

[Lottery Sale 0812_17] Unheated Burmese Jedi Spinel 0.430ct Loose Gemstone GUILD Sale price¥118,000

Brazilian Euclase (Bicolor Euclase) 0.302ct Loose Stone Sale price¥45,800

Colombian Euclase 0.546ct Loose Stone Sale price¥25,800

[12558559] Zimbabwe bicolor euclase rough stone 0.744ct Sale price¥39,800

American Herkimer Diamond (Rock Crystal) 5.5mm/0.534ct Loose Sale price¥8,800

American Herkimer Diamond (Rock Crystal) 5.3mm/0.594ct Loose Sale price¥7,980

コロンビア産パイライト・雲母インエメラルド 5.5mm/0.614ctルース鑑別書

[Published on 12563914] Loose Colombian Pyrite and Mica in Emerald, 0.614 ct Sale price¥45,800

[Listed as 12564020] Hackmanite 0.300ct Loose Stone Sale price¥59,800

イエローダイヤモンド 0.245ctルース(FANCY INTENSE ORANGY YELLOW, SI1)

【#202607AkihabaraPop-upOutOfStock】【Shinjuku Marui Annex 202605 OutOfStock】【#202604KobeOutOfStock】【#202509ShinjukuMarui OutOfStock】Yellow Diamond 0.245ct Loose (FANCY INTENSE ORANGY YELLOW, SI1) Sale price¥55,800

[#202607 Akihabara Pop-up Store - Currently Removed from Stock] [12563475 Posted] Mahenge Spinel (Pink Spinel) from Tanzania 0.492ct Loose Stone Sale price¥49,800

[#202607 Akihabara Pop-up Store - Currently Displayed] [12563067 Listed] Padparadscha Sapphire 0.649ct Loose Stone Sale price¥128,000

KARATZ Custom Made

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.

KARATZ・Five Commitments

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.