Under 1.0 ct

[Available 9/21, 10:00 PM] Colombian Emerald 0.152ct Loose Gemstone Sale price¥25,800

[Available Sept 21, 10 PM] Brazilian Mint Color Emerald 0.451ct Loose Stone Sale price¥15,800

[Available 9/21, 10:00 PM] Nigerian Green Beryl 0.311ct Loose Gemstone Sale price¥7,980

[On sale 9/21 at 22:00] Ruby 0.176ct Loose Stone Sale price¥15,800

[On sale 9/21 at 22:00] Sri Lankan Green Zircon 0.403ct Loose Stone Sale price¥5,980

[Available 9/21 at 10 PM] Madagascar Iolite 0.870ct Loose Gemstone Sale price¥9,800

[Available 9/29 at 10:00 PM] Mozambique Aquamarine 0.424ct Loose Gemstone Sale price¥7,980

Diamond 0.128ct loose stone (cabochon cut, maroon cut) Sale price¥45,800

Colombian pyrite-mica emerald 0.628ct loose stone Sale price¥29,800

Namibian Jeremejevite 0.158ct loose stone Sale price¥29,800

Namibian Jeremejevite 0.405ct loose stone Sale price¥79,800

Namibian Jeremejevite 0.394ct loose stone Sale price¥79,800

Colombian emerald 0.231ct loose stone Sale price¥25,800

Madagascar sphene 0.665ct loose stone Sale price¥9,800

Pakistani Oil in Quartz 0.283ct Loose Stone Sale price¥6,980

Pakistani Oil in Quartz 0.328ct Loose Stone Sale price¥7,980

Afghan Kunzite 0.799ct Loose Gemstone Sale price¥6,980

Tanzania Bicolor Zoisite 0.645ct Loose Stone Sale price¥11,800

American Herkimer Diamond 5.6mm/0.516ct Loose Sale price¥8,800

Colombian Trapiche Emerald 0.299ct Loose Sale price¥16,800

非加熱ブラジル産パライバトルマリン 0.051ctルース（CuO:2.0%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.051ct loose stone (CuO: 2.0%, MnO: 2.3%) Sale price¥39,800

Namibian Dioptase 0.134ct Loose Stone, Japan-Germany Mirror Sale price¥49,800

Russian demantoid garnet (horsetail recognized) 5.5mm/0.710ct loose Sale price¥188,000

[202608GIA Appraisal Request] [Sale on June 5th at 10 PM] Russian Demantoid Garnet (with horsetail inclusion) 5.8mm/0.876ct Loose Stone with Appraisal Report Sale price¥258,000

Russian Demantoid Garnet (Horsetail Recognized) 5.1mm/0.664ct Loose Stone Sale price¥228,000

ロシア産デマントイドガーネット（ホーステール認む） 5.3mm/0.692ctルース

Russian demantoid garnet (horsetail recognized) 5.3mm/0.692ct loose Sale price¥158,000

[202608GIA Appraisal Request] Russian Demantoid Garnet (horsetail inclusion confirmed) 5.2mm/0.661ct Loose Stone Sale price¥248,000

[Available 9/14, 10 PM] Stibiotantalite from Afghanistan, 0.212ct loose stone, JGL certified Sale price¥39,800

[#202607 Akihabara Popup Out for Sale] [Lottery Sale 12] [For Winners Only] [12562560 Listed] Unheated Montana Sapphire (Yogo Origin) 0.159ct Loose with Certificate Sale price¥98,000

[Available 9/12, 10:00 PM] Colombian Emerald 0.247ct Loose Gemstone Sale price¥39,800

[Available 9/29 at 10 PM] Sri Lankan Green Zircon 4.2mm/0.424ct Loose Gemstone Sale price¥8,800

[9/29 10 PM Sale] Cinnabar from Chenzhou, Hunan, China (0.646ct Loose Gemstone) Sale price¥18,800

[Available 9/29 at 22:00] Chinese Cinnabar from Hunan Province, 0.577ct loose stone Sale price¥15,800

[On sale 9/17 at 22:00] Hunan, China Cinnabar Loose Stone 0.532ct with Appraisal Certificate Sale price¥15,800

【9/17 22:00 Release】 Chinese Hunan Province Cinnabar 0.436ct Loose Stone with Identification Report Sale price¥13,800

[9/15 10 PM Release] Brazilian Goshenite 0.358ct Loose Gemstone Sale price¥8,800

タンザニア産サンストーン（イリュージョンサンストーン） 6.3mm/0.762ctルース

【9/11 10 PM Release】 Tanzanian Sunstone (Illusion Sunstone) 6.3mm/0.762ct Loose Gemstone Sale price¥9,800

【9/13 22:00 Release】 Euclase from Zimbabwe, 0.084ct loose stone, with identification report Sale price¥22,800

[Available 9/29 at 10 PM] Zimbabwean Bicolor Euclase 0.100ct Loose Gemstone with Identification Report Sale price¥19,800

[On sale 10/9 at 22:00] Zimbabwean Bicolor Euclase 0.096ct Loose Gemstone with Identification Report Sale price¥22,800

[Available 9/13, 10 PM] Bicolor Euclase from Zimbabwe, 0.068ct Loose Gemstone with Identification Report Sale price¥14,800

[On sale 9/13 at 22:00] Bi-color Euclase from Zimbabwe, 0.075ct loose stone with identification report Sale price¥18,800

[On sale 9/15 at 10 PM] Tanzanian Blue Spinel 0.725ct Loose Gemstone with Identification Report Sale price¥22,800

[Available 9/15, 10 PM] Tanzanian Blue Spinel 0.449ct Loose Gemstone with Identification Report Sale price¥12,800

[Available 9/12 at 10 PM] Kenyan Unheated Gold Sheen Sapphire 0.314ct Loose Gemstone with Appraisal Report Sale price¥22,800

[Available 9/17 at 10:00 PM] Kenyan Unheated Gold Sheen Sapphire 0.408ct Loose Gemstone with Identification Report Sale price¥25,800

【Available 9/30 at 10 PM】 Burmese Red Spinel 0.210ct Loose Stone with Identification Report Sale price¥18,800

[Available 10/9 at 10 PM] Burmese Red Spinel 0.188ct Loose Gemstone with Identification Report Sale price¥18,800

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.