New stock

Vietnam Aquamarine 0.494ct Loose Stone Sale price¥8,800

Brazilian Blue Tourmaline 0.196ct Loose Sale price¥6,980

Brazilian Green Tourmaline 2.218ct Loose Sale price¥25,800

Brazilian Bicolor Tourmaline 7.2mm/1.326ct Loose Stone Sale price¥18,800

Namibian Green Tourmaline 7.0mm/1.206ct Loose Stone (Lagoon Tourmaline) Sale price¥59,800

Brazilian Paraiba Tourmaline 0.341ct loose stone (CuO:1.81%, MnO:1.96%) Nakahokan analysis report Sale price¥598,000

Unheated Brazilian Paraiba Tourmaline 0.081ct loose stone (CuO: 2.1%, MnO: 2.3%) Sale price¥75,800

Morganite 0.379ct loose stone Sale price¥7,980

2.055ct Bicolor Sphalerite from Spain Sale price¥39,800

Chameleon Diamond Green Diamond 0.122ct Loose (FANCY GRAY GREEN, SI2) Sale price¥69,800

Royal Blue Sapphire 0.730ct Loose AIGS Sale price¥158,000

Brazilian Imperial Topaz 0.746ct Loose Sale price¥18,800

[#202607 Akihabara Pop-up Store Takeout in Progress] [On Sale June 20, 10 PM] Zimbabwe Green Diamond Rough (Sawable) 0.228ct Rough (Trigon) Sale price¥79,800

[Sale on June 19th at 10 PM] Mozambican Elbaite Tourmaline/Pink Tourmaline 1.126 ct Loose Stone (CuO: 0.2%, MnO: 2.4%) Sale price¥55,800

[On sale June 19, 10 PM] Colombian Trapiche Emerald 0.183ct Loose Stone Sale price¥39,800

【Sales start: June 15, 10 PM JST】Almandine Garnet from Tanzania 0.938ct Loose Stone Sale price¥12,800

[On sale June 17th at 10 PM] Canadian Eudialyte 2.4mm/0.052ct Loose Stone with Appraisal Sale price¥15,800

[On sale June 13th at 10 PM] Pakistani Lapis Lazuli (Lazurite) 0.103ct Loose Stone with Certification Sale price¥19,800

[On sale June 12th at 10 PM] Synthetic Alexandrite 1.381ct Loose Stone Sale price¥25,800

[On sale 6/12 10 PM JST] Synthetic Alexandrite 1.076ct Loose Stone Sale price¥25,800

[Sale June 16th, 10 PM] Myanmar Red Spinel 0.453ct Loose Stone Sale price¥19,800

[Sale starts June 16th at 10 PM] Myanmar Red Spinel 3.3mm/0.172ct Loose Stone Sale price¥8,800

[Sales start 10 PM on June 16] Myanmar Red Spinel 3.5mm/0.214ct Loose Gemstone Sale price¥9,800

[On sale June 14th at 10 PM] Myanmar Red Spinel 3.4mm/0.194ct Loose Stone Sale price¥9,800

[Sale starts June 16th, 10 PM JST] Myanmar Red Spinel 0.234ct Loose Gemstone Sale price¥12,800

[On Sale June 16, 10 PM] Loose 0.249ct Myanmar Red Spinel Sale price¥12,800

[On sale June 14th, 10 PM JST] Madagascar Apatite Cat's Eye 1.734ct Loose Stone, Nissaihou Sale price¥9,800

[On Sale June 20th, 10 PM JST] Myanmar Leuco Garnet 0.128ct Loose Stone with Appraisal Report Sale price¥25,800

【Sales start at 10 PM on June 21】Myanmar Leuco Garnet 0.108ct Loose Gemstone with Certificate Sale price¥22,800

[Available 6/18 10 PM JST] Botswana rough diamond (sawable) 0.118ct (trigon) Sale price¥29,800

[On Sale 10 PM, June 14th] Botswana Rough Diamond (Sawable) 0.090ct (Trigon) Sale price¥22,800

[Available June 21 at 10 PM] Botswana Rough Diamond (Sawable) 0.087ct Rough (Trigon) Sale price¥21,800

【#202607 Akihabara Pop-up Store Takeout in Progress】【Sale on June 15, 10 PM】Afghan Hauyne 0.098ct Loose Stone with Certificate Sale price¥25,800

[Sale starts 6/20 at 10 PM] Afghan Hauyne 0.080ct Loose Stone with Certificate Sale price¥22,800

【Sales begin on 6/21 at 10 PM】Mexican Fire Opal 1.857ct Loose Gemstone Sale price¥25,800

[On sale June 21st, 10 PM] Mexican Fire Opal Loose Stone 2.279ct Sale price¥15,800

[On sale July 24 at 10 PM] Mexican Fire Opal Loose Stone 0.729ct Sale price¥8,800

[On sale June 23rd, 10 PM JST] Colombian Trapiche Emerald 0.210ct Loose Stone Sale price¥39,800

[On sale June 21, 10 PM JST] Tanzania Zircon 3.643ct Loose Stone Sale price¥22,800

[On Sale June 18th at 10 PM] Madagascar Bi-Color Sapphire 3.7mm/0.271ct Loose Gemstone Sale price¥6,980

[On sale June 14, 10 PM JST] Brazilian Canary Yellow Chrysoberyl 0.672 ct Loose Gemstone Sale price¥18,800

[On sale June 13th at 10 PM] Blue Sapphire 0.369ct Loose Stone (with Japan-Germany gemological report) Sale price¥22,800

【On sale June 14, 10 PM】Spanish Andalusite 0.416ct Loose Stone Sale price¥9,800

【#202607AkihabaraPopUpTakenOut】【6/14 10 PM Sale】Australian Black Opal 1.080ct Loose Stone Sale price¥39,800

[#202607 Akihabara Pop-Up Store Item] [Sale starts 10 PM on June 21st] Australian Black Opal 0.755ct Loose Stone Sale price¥12,800

[#202607AkihabaraPopUpOnLoan] Australian Black Opal 0.520ct Loose Sale price¥13,800

【#202607 Akihabara Pop-up Store - Currently Displayed Off-site】Australian Black Opal 0.424ct Loose Gemstone Sale price¥12,800

【#202607 Akihabara Pop-up Item on Loan】Unheated Pink Imperial Topaz (Sherry Pink) 0.220ct Loose Stone Sale price¥13,800

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.