New stock

Demantoid garnet from Madagascar 0.063ct loose Sale price¥8,800

Demantoid garnet from Madagascar 0.057ct loose Sale price¥9,800

[Koshu Precious Stones plusthree] Ametrine 7.238ct loose stone with patch Sale price¥39,800

[Sakura Incut] YAG (Yttrium Aluminum Garnet) 9mm/3.410ct Loose Sale price¥55,800

Blue watermelon tourmaline 2.380ct loose Sale price¥15,800

Blue watermelon tourmaline 6.815ct loose Sale price¥49,800

Colombian emerald cat's eye 0.138ct loose Sale price¥17,800

Mexican Fire Agate 5.110ct Loose Stone Sale price¥14,800

Benitoite 13 stone half eternity ring set (1.8mm) Sale price¥158,000

Limited to 23 stones: 1 Ethiopian opal loose stone (sphere, 4.5-5.0mm) Multiple purchase discounts available Sale price¥5,980

《Yurakucho Marui 2024112 takeout》Brazilian Paraiba Tourmaline 0.341ct loose stone (CuO:1.81%, MnO:1.96%) Nakahokan analysis report Sale price¥598,000

Andesine Labradorite (also known as Rainbow Moonstone) 1.373ct loose stone Sale price¥12,800

Andesine Labradorite (also known as Rainbow Moonstone) 1.009ct loose stone Sale price¥12,800

Indian Bloodshot Iolite Sunstone 1.274ct Loose Sale price¥6,980

Unheated Brazilian Paraiba Tourmaline 0.081ct loose stone (CuO: 2.1%, MnO: 2.3%) Sale price¥98,000

Unheated Brazilian Paraiba Tourmaline 0.088ct loose stone (CuO: 1.9%, MnO: 2.3%) Sale price¥98,000

Unheated Brazilian Paraiba Tourmaline 0.059ct loose stone (CuO: 1.4%, MnO: 2.7%) Sale price¥63,800

Unheated Brazilian Paraiba Tourmaline 0.069ct loose stone (CuO: 1.6%, MnO: 2.6%) Sale price¥79,800

Unheated Brazilian Paraiba Tourmaline 0.065ct loose stone (CuO: 2.0%, MnO: 2.4%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.066ct loose stone (CuO: 1.5%, MnO: 2.2%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.063ct loose stone (CuO: 1.8%, MnO: 2.4%) Sale price¥75,800

Unheated Brazilian Paraiba Tourmaline 0.061ct loose stone (CuO: 1.7%, MnO: 2.2%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.055ct loose stone (CuO: 1.9%, MnO: 2.2%) Sale price¥59,800

Unheated Brazilian Paraiba Tourmaline 0.066ct loose stone (CuO: 1.7%, MnO: 2.4%) Sale price¥79,800

Unheated Brazilian Paraiba Tourmaline 0.056ct loose stone (CuO: 1.7%, MnO: 2.3%) Sale price¥59,800

Unheated Brazilian Paraiba Tourmaline 0.062ct loose stone (CuO: 1.7%, MnO: 2.5%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.058ct loose stone (CuO: 2.0%, MnO: 2.2%) Sale price¥59,800

Unheated Brazilian Paraiba Tourmaline 0.056ct loose stone (CuO: 2.1%, MnO: 2.2%) Sale price¥69,800

Unheated Brazilian Paraiba Tourmaline 0.057ct loose stone (CuO: 1.6%, MnO: 2.4%) Sale price¥69,800

Pink tourmaline 0.692ct loose stone Sale price¥18,800

Pink tourmaline 0.845ct loose stone Sale price¥14,800

Yellow Opal 0.372ct Loose (Faceted Cut) Sale price¥8,800

Yellow Opal 0.361ct Loose (Faceted Cut) Sale price¥6,980

0.768ct Yellow Sapphire Loose Stone from Ratnapura, Sri Lanka Sale price¥19,800

0.421ct loose yellow sapphire from Ratnapura, Sri Lanka Sale price¥11,800

Purple spinel 0.697ct loose stone Sale price¥14,800

Pink spinel 0.713ct loose stone Sale price¥8,800

Morganite 0.379ct loose stone Sale price¥8,800

Goshenite 0.846ct loose stone Sale price¥8,800

Mexican Hyalite Opal 1.215ct Loose (Faceted Cut) Sale price¥9,800

Nepalese Kyanite 0.277ct loose stone Sale price¥5,980

《Yurakucho Marui 2024112 takeout》 Tanzanian Sunstone (Illusion Sunstone) 1.058ct loose stone Sale price¥8,800

Benitoite 0.338ct loose stone Sale price¥258,000

Australian Rainbow Lattice Sunstone 0.468ct Loose Stone Sale price¥5,980

Australian Rainbow Lattice Sunstone 0.463ct Loose Stone Sale price¥5,980

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

Bulgarian Green Sphalerite 0.579ct Loose Stone Sale price¥148,000

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.

KARATZ・Five Commitments