Less than 0.5 ct

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

[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

【9/17 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

【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

[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

【On sale 9/12 at 10 PM】 Kenyan unheated gold sheen sapphire 0.329ct loose stone with appraisal report Sale price¥25,800

[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

[9/11 10 PM Sale] Burmese Red Spinel 0.146ct Loose Stone with Appraisal Report Sale price¥15,800

[Available 9/11 at 10 PM] Burmese Red Spinel 0.100ct Loose Stone with Identification Report Sale price¥11,000

[Available 9/13, 10:00 PM] Spanish Pink Cobalt Calcite 0.443ct Loose Stone with Identification Report Sale price¥35,800

[Available 9/17 at 10:00 PM] Russian Phenakite from Malyshevo, 0.493ct Loose Gemstone, JGGL Certified Sale price¥14,800

[On sale 9/29, 10 PM] Russian Malyshevo Phenakite 4.7mm/0.428ct Loose Stone, JGL Certified Sale price¥14,800

[Available 10/16, 10 PM] Russian Malyshevo Phenakite 0.489ct Loose Stone (JGL Certified) Sale price¥15,800

[Available 10/4, 10 PM] Kenyan Unheated Gold Sheen Sapphire 0.224ct Loose Gemstone with Identification Report Sale price¥15,800

[Lottery Sale ②_202608_02] Unheated Kashmir Sapphire 2.6mm/0.110ct Loose Stone GIA Sale price¥79,800

[Listed under 12563270] South African rough diamond (sawable) 0.477ct Sale price¥178,000

Zimbabwean Apatite (UV type) 0.209ct loose stone Sale price¥4,980

Nigerian Aventurine Aquamarine 0.471ct Loose Stone Sale price¥6,980

Violet Sapphire 4.3mm/0.328ct Loose Sale price¥15,800

Bicolor Euclase from Zimbabwe 0.033ct loose Sale price¥18,800

[Lottery Sale 0707_10] Unheated Montana Sapphire (Yogo Mine) 0.173ct Loose Stone with Japan-Germany Gemological Report Sale price¥98,000

【Lottery Sale 0718_07】Tanzanian Pink Zoisite 0.398ct Loose Stone with Certificate Sale price¥59,800

Brazilian Paraiba Tourmaline 0.037ct Loose (CuO:1.9%, MnO:2.3%) Sale price¥29,800

Paraiba Tourmaline from Brazil 0.067 ct loose (CuO: 1.4%, MnO: 2.4%) Sale price¥39,800

【12552125掲載】デトロイトシティ産ロードクロサイト 0.439ctルース

Detroit City Rhodochrosite 4mm/0.439ct Loose Stone Sale price¥6,980

Colombian Trapiche Emerald 0.372ct Loose Sale price¥18,800

Tanzanite from Tanzania 0.262ct loose stone Sale price¥8,800

Tanzania Bicolor Zoisite 0.397ct Loose Stone Sale price¥8,800

ブラジル産パライバトルマリン 0.239ctルース（CuO:1.0%、MnO:3.9%）

Brazilian Alexandrite 0.239ct Loose Gemstone [Listed as 12564071] Sale price¥45,800

[Available 9/4 at 10 PM] Ruby 0.411ct Loose Stone Sale price¥18,800

【9/4 10:00 PM Sale】Ruby 0.200ct Loose Stone Sale price¥12,800

[Available 9/4 at 10 PM] Ruby 0.141ct loose stone Sale price¥9,800

【Available 9/6 at 10 PM】 Tanzanian Windsor Sapphire (Purple Sapphire) 0.277ct Loose Gemstone Sale price¥12,800

タンザニア産ウィンザーサファイア（カラーチェンジサファイア） 0.261ctルース

【9/12 22:00 Release】 Tanzanian Windsor Sapphire (Color Change Sapphire) 0.261ct Loose Gemstone Sale price¥9,800

【9/6 10PM On Sale】Pakistan Oil-in-Quartz 0.281ct Loose Gemstone Sale price¥4,980

【9/7 10 PM Release】Tanzanian Silky Pink Spinel 0.219ct Loose Gemstone Sale price¥8,800

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.