Less than 1.0ct

[On sale July 12th at 10 PM] Madagascar Grandidierite 0.179ct Loose Gemstone with Certificate Sale price¥35,800

coming soon

[Listed as 12563740] Madagascar Grandidierite 0.171ct Loose Stone Sale price¥29,800

coming soon

[12563734] Tanzanian Red Spinel, 0.229ct Loose Sale price¥45,800

[On sale 7/12 at 10 PM] Colombian Emerald 0.135ct Loose Stone - Houki-kyo Sale price¥29,800

[On sale July 12th, 10 PM JST] Colombian Emerald, 0.191 ct loose stone, Hoki Kyokai Sale price¥45,800

[Available July 11, 10 PM JST] Kenya Bi-Color Grossular Garnet 0.809 ct Loose Stone Sale price¥25,800

[Listing No. 12563397] Brazilian Alexandrite 0.217 ct Loose Stone Sale price¥39,800

[12563393 listed] Tanzanian Red Spinel 0.098ct Loose Stone Sale price¥15,800

[Listed 12563403] Petzottaite from Madagascar 0.200ct Loose Sale price¥29,800

[Listed as 12563264] Rough Russian Diamond (Sawable) 0.124ct Sale price¥39,800

Sierra Leonean Rough Diamond (Sawable) 0.072 ct. [12563273 Listed] Sale price¥22,800

[12563374 Posted] Bicolor Euclase from Zimbabwe, 0.055ct Loose Stone Sale price¥14,800

[Posted on 12563395] Tanzanian Pink Spinel 0.148ct Loose Gemstone Sale price¥22,800

[Item 12563407] Afghan Green Hauyne 0.075ct Loose Stone Sale price¥29,800

[Published 12562264] Brazilian Lazulite 0.048ct Loose Sale price¥36,800

【Lottery Sale 0409_01】Myanmar Taaffeite 3.3mm/0.152ct Loose Stone with Certificate Sale price¥49,800

[Lottery Sale_0612_01] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.542ct Loose Sale price¥55,800

[On Sale July 9, 10 PM JST] Bicolor Grossular Garnet from Tanzania 0.839ct Loose Stone Sale price¥19,800

[On sale July 3 at 10 PM] Tanzanian Bi-Color Grossular Garnet 0.934ct Loose Stone Sale price¥24,800

【Sale starts 10 PM on July 3rd】Tanzanian Bicolor Grossular Garnet 0.779 ct Loose Stone Sale price¥19,800

【Sales start at 10 PM on July 3rd (JST)】Bicolor Grossular Garnet from Tanzania 0.602ct Loose Gemstone Sale price¥16,800

[On sale July 9th at 10 PM JST] Tanzanian Bicolor Grossular Garnet 0.787ct Loose Stone Sale price¥19,800

[On sale July 6th at 10 PM JST] 0.544ct Tanzanian Bi-Color Grossular Garnet Loose Gemstone Sale price¥14,800

【Sales start 10 PM JST on July 6】Tanzanian Bi-Color Grossular Garnet 0.586ct Loose Gemstone Sale price¥14,800

Paraiba tourmaline from Brazil 0.090ct loose Sale price¥69,800

Paraiba tourmaline from Brazil 0.056ct loose Sale price¥45,800

[On sale July 3 at 10 PM] Jeremejevite from Namibia, 0.103 ct loose stone, with certificate Sale price¥25,800

[On sale July 3 at 10 PM] Jeremejevite from Namibia, 0.218ct loose stone, with a certificate of authenticity Sale price¥49,800

[On sale 7/9 at 10 PM] Brazilian Santa Maria Aquamarine Loose Stone 0.188ct with certification Sale price¥25,800

[On sale July 4, 10 PM] 0.416 ct Loose Mozambique Ruby with Certificate Sale price¥29,800

[On sale July 12th at 10 PM] Synthetic Rutile 4.3mm/0.447ct Loose Gemstone Sale price¥12,800

[On sale July 5th at 10 PM] Sri Lankan Blue Sapphire, 0.550 ct Loose Stone with Gemstone Report Sale price¥39,800

[Sale starts July 6th at 10 PM] Sri Lankan Blue Sapphire 4.0mm/0.269ct Loose Stone with Appraisal Sale price¥29,800

[On sale July 5, 10 PM] Sri Lankan orange sapphire 0.654ct loose stone with gemological report Sale price¥29,800

[On sale July 6th at 10 PM] Sri Lankan Yellow Sapphire 0.815ct Loose Stone with Certification Sale price¥15,800

[On sale July 5th at 10 PM JST] Madagascar Grandidierite 2.8mm/0.086ct Loose Stone with Certification Sale price¥18,800

[On Sale July 5 at 10 PM JST] Madagascar Grandidierite 2.5mm/0.065ct Loose Stone with Certification Sale price¥15,800

[On sale July 9th, 10 PM JST] Tanzanian Windsor Sapphire (Purple Sapphire) 0.393ct Loose Stone with Certificate Sale price¥18,800

[On sale July 5th at 10 PM] 0.566ct Loose Tanzanian Mahenge Spinel (Pink Spinel) with identification Sale price¥55,800

[On Sale July 10 at 10 PM JST] Tanzanian Mahenge Spinel (Pink Spinel) 0.333ct Loose Stone with Gemological Report Sale price¥29,800

【Sales start: July 10, 10 PM JST】Madagascar Sapphire 0.553ct Loose Gemstone with Identification Report Sale price¥13,800

[On sale July 5th at 10 PM] Colombian Emerald 0.147ct Loose Stone with Appraisal Sale price¥12,800

[On sale July 5th at 10 PM] Colombian Emerald 3.3mm/0.167ct Loose Gemstone with Certificate Sale price¥24,800

[On Sale July 5th at 10 PM] Colombian Emerald 3.3mm/0.158ct Loose Stone with Appraisal Sale price¥18,800

[Sales start July 5, 10 PM JST] Madagascar Padparadscha Sapphire 3.3mm/0.156ct Loose Stone - Central Gem Laboratory certified Sale price¥29,800

[On sale July 5th at 10 PM] Madagascar Padparadscha Sapphire 4.5mm/0.416ct Loose Stone with Chubo Certification Sale price¥98,000

Brazilian Euclase 0.289ct loose stone Sale price¥12,800

Brazilian Euclase 0.263ct Loose Stone (Colorless Euclase) 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.