Vertical: 4.1 - 5.0mm

[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

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

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

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

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

インターナリーフローレスダイヤモンド（H&C） 4.0mm/0.245ctルース(D, IF, 3Excellent H&C)

【9/6 10:00 PM Sale】Internally Flawless Diamond (H&C) 4.0mm/0.245ct Loose (D, IF, 3Excellent H&C) Sale price¥128,000

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

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

Manganotantalite 0.736ct loose stone from Japan and Germany Sale price¥128,000

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

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

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

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

[9/7 10:00 PM Sale] Tanzania Bicolor Grossular Garnet 0.433ct Loose Stone Sale price¥15,800

【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

[Available 9/7 at 10 PM] Sri Lankan Chrysoberyl Cat's Eye 4.3mm / 0.526ct Loose Gemstone Sale price¥15,800

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

Mozambique Aquamarine 4.9mm/0.463ct Loose Stone Sale price¥8,800

[Available 8/30 at 10:00 PM] Madagascar Sapphirine 0.145ct Loose Stone with Identification Report Sale price¥11,800

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

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

[8/29 10 PM Sale] Tanzanian Mint Garnet 0.296ct Loose Gemstone Sale price¥8,800

[8/29 10 PM Sale] Brazilian Lavender Quartz (Skorolite) 0.475ct Loose Gemstone Sale price¥7,980

【#202607 Akihabara Pop-up Store - Currently Removed from Stock】【Listed on 12563192】Unheated Ruby 0.210ct Loose Stone Sale price¥62,800

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.284ctルース

【#202607 Akihabara Pop-up, Currently Out of Stock】【12563254 Listed】Madagascar Bekily Blue Garnet (Color Change Garnet) 0.284ct Loose Sale price¥59,800

【#202607 Akihabara Pop-up Store - Currently Removed from Stock】【12563063 Listed】Padparadscha Sapphire 0.619ct Loose Stone Sale price¥138,000

Brazilian Euclase 0.224ct Loose Stone (Bicolor Euclase) Sale price¥18,800

【9/1 10 PM Release】Colombian Emerald 0.123ct Loose Gemstone Sale price¥18,800

[Available 9/1 at 10 PM] Tanzanian Tsavorite 0.366ct Loose Stone Sale price¥13,800

[On sale 9/1 at 22:00] Pigeon Blood Ruby 0.350ct Loose Stone AIGS Sale price¥49,800

[Available 9/2, 10:00 PM] Pigeon Blood Ruby 0.325ct Loose Stone, JTL Certified Sale price¥69,800

[Available 8/31, 10 PM] Pakistani Axinite (Blue Tint) 0.263ct Loose Gemstone Sale price¥18,800

[Available 9/3, 10 PM] Sri Lankan Purple Sapphire 0.258ct Loose Gemstone with Identification Report Sale price¥25,800

[Featured in 12563725] Sri Lankan Pink Sapphire 0.319ct Loose Sale price¥29,800

【Sale starts 8/25 10 PM JST】Synthetic Rutile 0.344ct Loose Gemstone Sale price¥8,800

[On sale August 25th, 10 PM] Ruby 0.168ct Loose Stone Sale price¥11,800

[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

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

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

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

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

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.