New stock

American benitoite 0.069ct loose Sale price¥19,800

South African yellow diamond (makeable) 0.202ct rough stone Sale price¥15,800

South African gray diamond (makeable) 0.169ct rough stone Sale price¥14,800

Tanzanite from Tanzania 0.467ct loose stone Sale price¥9,800

Tanzanite from Tanzania 0.436ct loose stone Sale price¥8,800

Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 6.7mm/1.488ct Loose Sale price¥12,800

Tanzanian Bicolor Grossular Garnet 2.997ct Loose Stone Sale price¥69,800

[#202607 Akihabara Pop-up Store Carry Out] Afghan Kunzite 9.214ct Loose Sale price¥45,800

[#202607 Akihabara Pop-up Store - Currently Removed] Zimbabwean Sphene 2.067ct Loose Stone Sale price¥59,800

[#202607 Akihabara Pop-up Store Carry Out] Zimbabwe Sphene 2.520ct Loose Stone Sale price¥59,800

0.257ct Unheated Silky Pink Sapphire from Vietnam Sale price¥12,800

Sri Lankan Bicolor Sapphire 0.607ct Loose Stone Sale price¥15,800

Brazilian green tourmaline 1.233 ct loose stone Sale price¥69,800

Tanzanite from Tanzania 0.730ct loose stone Sale price¥29,800

Brazilian Santa Maria Aquamarine 0.524ct Loose Stone Sale price¥55,800

Kenyan Tsavorite 1.026ct Loose Stone Sale price¥98,000

Colombian emerald 0.105ct loose Sale price¥31,800

Oregon Sunstone from the United States, 5.0mm/0.520ct loose stone Sale price¥15,800

Australian black opal 0.758ct loose stone Sale price¥18,800

3.583ct Australian Black Opal Loose Stone (Double Sided) Sale price¥29,800

Tanzanite from Tanzania 0.680ct loose stone Sale price¥15,800

Sri Lankan bicolor sapphire 0.586ct loose stone Sale price¥39,800

Demantoid garnet 15.468ct rough stone from Madagascar Sale price¥9,800

Mangano tantalite from Afghanistan 0.233ct loose Sale price¥39,800

Sphene from Madagascar 0.498ct loose Sale price¥6,980

Cambodian Blue Zircon 0.205ct Loose Sale price¥3,980

Cambodian Blue Zircon 0.204ct Loose Sale price¥3,980

Cambodian Blue Zircon 0.221ct Loose Sale price¥3,980

Synthetic moissanite (gray blue) 1.701ct loose Sale price¥12,800

Paraiba tourmaline from Brazil 3.5mm/0.278ct loose Sale price¥29,800

Paraiba tourmaline from Brazil 0.243ct loose Sale price¥14,800

Cambodian Blue Zircon 0.609ct Loose Sale price¥5,980

Rutile (single crystal) from Sri Lanka 10.697ct rough Sale price¥25,800

Paraiba tourmaline from Mozambique 0.516ct loose Sale price¥39,800

Paraiba tourmaline from Mozambique 0.270ct loose Sale price¥18,800

Mexican Water Opal 2.623ct Loose (Contralus Opal) Sale price¥39,800

Mexican Water Opal 1.790ct Loose (Contralus Opal) Sale price¥29,800

Synthetic rutile 5mm/0.553ct loose stone Sale price¥12,800

Synthetic rutile 5.8mm/0.904ct loose stone Sale price¥12,800

Kunzite from Afghanistan 23.634ct loose stone Sale price¥98,000

Myanmar color change zircon 0.697ct loose stone Sale price¥39,800

Rough diamond (sawable) 0.466ct rough diamond (with trigon) Sale price¥98,000

Diamond rough (makeable) 0.204ct rough Sale price¥39,800

0.604ct rough diamond Sale price¥12,800

Mozambique Ruby 0.544ct Loose Stone with Certificate of Authenticity Sale price¥39,800

Brazilian green tourmaline 4.345ct loose stone Sale price¥69,800

Tanzanite from Tanzania 2.777ct loose stone Sale price¥98,000

Myanmar Color Change Zircon 5.3mm/1.043ct Loose Stone Sale price¥69,800

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.