Less than 0.5 ct

【Available 10/3 at 10 PM】 Colombian Mica-in-Emerald 4.2mm/0.249ct Loose Gemstone with Certificate of Authenticity Sale price¥22,800

[Available Oct 11, 10 PM] Colombian Pyrite and Mica in Emerald 0.432ct Loose Stone with Identification Report Sale price¥35,800

[Available Oct 4, 10 PM] Synthetic Alexandrite 0.264ct Loose Gemstone Sale price¥9,800

[10/5 10:00 PM Release] Australian Black Opal 0.261ct Loose Stone Sale price¥9,800

[On sale 10/8 at 22:00] Phenakite from Malyshevo, Russia, 0.366ct loose stone Sale price¥18,800

[Available 10/2 at 10 PM] Sri Lankan Pink Sapphire 4.1mm/0.354ct Loose Gemstone with Appraisal Report Sale price¥22,800

[10/14 10:00 PM Release] Vietnamese Aquamarine 0.339ct Loose Stone Sale price¥9,800

[Item 12564511] Russian Alexandrite 0.103ct Loose Stone Sale price¥128,000

[Listing 12556682] Zambian Emerald 0.202ct Loose Stone Sale price¥15,800

[12564313 listed] Spanish Pink Cobalt Calcite 0.360ct Loose Stone Sale price¥25,800

[9/14 (Mon) 10:00 AM Deadline: Lottery Sale_08] Unheated Pigeon Blood Ruby 0.270ct Loose Stone AIGS Sale price¥48,800

[9/27 10:00 PM Release] Colombian Emerald 0.079ct Loose Stone Sale price¥8,800

[9/27 10:00 PM Release] Colombian Emerald 0.121ct Loose Stone Sale price¥15,800

[9/27 10 PM Sale] Colombian Emerald 0.148ct Loose Stone Sale price¥29,800

[Available 10/7, 10:00 PM] Colombian Emerald 0.145ct Loose Stone Sale price¥35,800

[Available 9/25, 10 PM] Pigeon Blood Ruby 3.6mm/0.220ct Loose Gemstone AIGS Sale price¥49,800

[9/25 10 PM Release] Indonesian Parasitic Peridot 3.8mm/0.268ct Loose Gemstone, NGL Certified Sale price¥128,000

[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 9/30 at 10:00 PM] Jeremejevite from Namibia, 0.061ct loose stone, with identification report Sale price¥15,800

[Available 9/19 at 10 PM] Jeremejevite from Namibia, 0.054ct loose stone with identification report Sale price¥14,800

[9/19 10 PM Sale] Jeremejevite from Namibia 0.053ct Loose Stone with Appraisal Report Sale price¥14,800

[Available 9/19 at 22:00] Jeremejevite from Namibia, 0.045ct Loose Stone with Identification Report Sale price¥15,800

[9/18 10 PM Sale] Brazilian Goshenite 4.3mm/0.376ct Loose Gemstone Sale price¥6,980

アフガニスタン産アフガニスタン産ラズライトインソーダライト 0.425ctルース

[Available 9/18 10:00 PM] Lazulite in Sodalite from Afghanistan 0.425ct Loose Gemstone Sale price¥9,800

[Available 9/20 at 10:00 PM] Brazilian Alexandrite 0.054ct Loose Gemstone Sale price¥12,800

[Available 9/26, 10:00 PM] Sri Lankan Green Zircon 4.5mm/0.474ct Loose Gemstone Sale price¥9,800

【Available 9/22, 10:00 PM】 Colombian Emerald 0.078ct Loose Gemstone Sale price¥18,800

[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

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.328ctルース

[Available 9/25 at 10 PM] Madagascar Andesine-Labradorite (Common name: Rainbow Moonstone) 0.328ct Loose Stone Sale price¥9,800

[Available Sept. 21, 10:00 PM] Colombian Emerald 0.267ct Loose Gemstone Sale price¥39,800

[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 9/29 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

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

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

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

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

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.