Width: 3.1 - 4.0mm

[Available 9/22, 10 PM] Unheated Pigeon Blood Ruby 0.310ct Loose AIGS Sale price¥49,800

[Lottery Sale 0818_12] Loose 0.251ct Red Beryl (USA) with Certificate Sale price¥98,000

【Listed as 12564080】Brazilian unheated purple-pink imperial topaz 0.343ct loose gemstone Sale price¥49,800

[Available 9/22, 10 PM] Colombian Emerald 0.150ct Loose Stone Sale price¥12,800

[Available 9/19 at 10 PM] Colombian Emerald with Pyrite, 0.634ct Raw Gemstone Sale price¥19,800

[On sale 9/19 at 22:00] Colombian Emerald with Pyrite, 0.981ct Raw Gemstone Sale price¥29,800

[Available 9/26 at 22:00] Sri Lankan Green Zircon 0.786ct Loose Gemstone Sale price¥15,800

[Available 9/24 at 10 PM] Australian Black Opal 0.322ct Loose Gemstone Sale price¥16,800

【9/20 22:00 Release】 Madagascar Padparadscha Sapphire 3.6mm/0.281ct Loose Stone, DGL Certified Sale price¥35,800

[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

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

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

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

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

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

[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

[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

[9/13 10:00 PM Release] Spanish Pink Cobalt Calcite 0.523ct Loose Stone with Gem Identification Report Sale price¥39,800

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

[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

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

【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

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 9/6 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

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

[On sale 9/7 at 10 PM] Tanzanian Silky Pink Spinel 0.218ct Loose Stone Sale price¥8,800

【Available 9/7 at 10 PM】 Tanzanian Bicolor Grossular Garnet 0.596ct Loose Gemstone Sale price¥14,800

【9/7 10 PM Release】Indian Parrot Chrysoberyl 0.288ct Loose Stone Sale price¥12,800

ブラジル産非加熱ピンクインペリアルトパーズ（シェリーピンク） 0.496ctルース

[9/7 10 PM Release] Brazilian Unheated Imperial Topaz (Sherry Color) 0.496ct Loose Gemstone Sale price¥29,800

[Available 9/24 10:00 PM] USA Anthill Garnet 4.0mm, 0.336ct Loose Stone Sale price¥9,800

[Available 9/11 at 10 PM] Sri Lankan Purple Sapphire 0.271ct Loose Gemstone with Identification Report Sale price¥18,800

Tanzania Bicolor Zoisite 0.357ct Loose Stone Sale price¥6,980

[Lottery Sale 0812_18] Zambian Non-Oil Emerald 0.540ct Loose GIA Sale price¥178,000

【8/30 10 PM Release】Sphene from Zimbabwe 0.302ct Loose Gemstone Sale price¥8,800

[Available 8/30 at 10 PM] Colombian Mint Color Emerald 0.359ct Loose Stone Sale price¥12,800

[Available 8/30 at 10 PM] Zimbabwean Sphene 0.332ct Loose Gemstone Sale price¥9,800

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.