Japan-Germany Gemstone Research Institute

【7/12 22時販売】パキスタン産ヴェイリネナイト（ベイリネナイト） 0.161ctルース日独鑑 Sale price¥45,800

【7/11 22時販売】タンザニア産ロードライトガーネット 4.8mm/0.579ctルース日独鑑 Sale price¥12,800

【7/10 22時販売】スリランカ産ロードライトガーネット 0.244ctルース日独鑑 Sale price¥8,800

【7/10 22時販売】オレンジカルサイト 0.740ctルース日独鑑 Sale price¥9,800

[On sale at 22:00 on 6/22] Sri Lankan Zircon Cat's Eye 2.087ct Loose Stone, Japan-Germany Sale price¥39,800

[On sale at 10pm on 6/22] Mozambique Rhodolite Garnet 0.520ct Loose Stone, Japan-Germany Scale Sale price¥9,800

[On sale at 22:00 on 6/15] Nigerian Cobalt Garnite 0.175ct Loose Stone, Japan-Germany Exchange Sale price¥35,800

[E29 Hakata Delivery] [On sale at 22:00 on 6/8] Bulgarian Green Sphalerite 1.052ct Loose Stone, Japan-Germany Scale Sale price¥128,000

[E29 Hakata Delivery] [On sale at 22:00 on 6/7] Bolivian Phosphophyllite 0.921ct Loose Stone, Japan-Germany Exchange Sale price¥598,000

[On sale from 10pm on 5/30] Nigerian Blue Garnite 0.794ct Loose Stone, Japan-Germany Quantity Sale price¥79,800

[On sale at 22:00 on 5/24] Nigerian Cobalt Garnite 0.216ct Loose Stone, Japan-Germany Exchange Sale price¥45,800

[On sale from 22:00 on 5/23] Myanmar Musgravite 0.214ct loose stone Nikko Kan Sale price¥258,000

[On sale from 22:00 on 5/21] Myanmar Forsterite 0.655ct loose stone, Japan-Germany Sale price¥15,800

[On sale from 22:00 on 5/21] Myanmar Forsterite 0.887ct loose stone, Japan-Germany Sale price¥15,800

[On sale from 10pm on 5/18] Brazilian bicolor tourmaline 4.554ct loose stone from Nikkei Sale price¥298,000

[On sale from 10pm on 5/15] American Red Beryl 0.200ct Loose (Heart Shape) Nikkei Kan Sale price¥35,800

[On sale at 22:00 on 5/11] Congo Andesine 18.643ct Loose Stone, Japan-Germany Exchange Sale price¥69,800

[On sale from 10pm on 5/4] Colombian Euclase 5.223ct Loose Stone, Japan-Germany Quantity Sale price¥198,000

[5/4 22:00 Sale] Pt950 Sri Lankan Cobalt Spinel 0.697ct Ring, Japan-Germany Exchange Sale price¥98,000

[On sale from 22:00 on 5/2] Colombian Euclase 2.443ct Loose Stone, Japan-Germany Quantity Sale price¥148,000

[On sale from 22:00 on 5/2] Parasite Peridot 0.220ct loose stone (parasite peridot) Nikkei Sale price¥79,800

[On sale from 10pm on 5/1] Brazilian Euclase 0.210ct Loose Stone, Japan-Germany Quantity Sale price¥29,800

[On sale at 10pm on 4/29] American Red Beryl 0.207ct Loose Stone, Japan-Germany Quantity Sale price¥45,800

[On sale at 10pm on 4/24] Brazilian Pink Imperial Topaz 1.511ct Loose Stone, Japan-Germany Exchange Sale price¥69,800

[On sale at 22:00 on 4/24] Namibian Jeremejevite (Elemejevite) 0.154ct loose stone, Nikko Kan Sale price¥15,800

[On sale at 22:00 on 4/24] Namibian Jeremejevite 0.153ct loose stone by Nikkei Kan Sale price¥15,800

[On sale at 22:00 on 4/24] Namibian Jeremejevite (Elemejevite) 0.121ct loose stone, Nikko Kan Sale price¥12,800

[On sale at 22:00 on 4/24] Namibian Jeremejevite 0.118ct loose stone by Nikkei Kan Sale price¥12,800

[On sale at 10pm on 4/24] Brazilian Pink Imperial Topaz 0.909ct Loose Stone, Japan-Germany Exchange Sale price¥39,800

[On sale from 22:00 on 4/21] Tanzanian Kornerupine (prismatine) 0.276ct loose stone, Japan-Germany Exchange Sale price¥39,800

[On sale from 22:00 on 4/21] Tanzanian Kornerupine (prismatine) 0.413ct loose stone, Japan-Germany Exchange Sale price¥39,800

[On sale at 22:00 on 4/19] Brazilian bicolor pink euclase 0.310ct loose stone, Nikko Kan Sale price¥128,000

Tanzania Magnesioaxinite 0.176ct loose stone by Nikkei Sale price¥59,800

Tanzania Magnesioaxinite 0.198ct loose stone by Nikkei Sale price¥69,800

Sri Lankan Water Quartz (Waterin Quartz) 26.243ct Loose Stone, Japan-Germany Exchange Sale price¥69,800

Vietnam Cobalt Spinel (Color Change) 2.7mm/0.082ct Loose Stone, Japan-Germany Exchange Sale price¥59,800

Sri Lankan Musgravite 0.389ct Loose Stone (Tubular Inclusions) Nikkei Sale price¥398,000

Canadian Shortite 0.423ct Loose Stone, Japan-Germany Mirror Sale price¥69,800

Canadian Natrolite 7.1mm/0.982ct Loose Stone by Nikkei Sale price¥35,800

Sri Lankan magnetite 6.245ct loose stone by Nikkei Sale price¥22,800

Brazilian cat's eye emerald 6.080ct loose stone, Japan-Germany exchange Sale price¥298,000

Zimbabwe Bicolor Euclase 0.405ct Loose Stone by Nikkei Sale price¥298,000

Zimbabwe Bicolor Euclase 0.503ct Loose Stone, Japan-German Index [Featured in the Gemstone Encyclopedia] Sale price¥398,000

K18YG American Red Beryl 0.239ct Emerald, Red Beryl and Diamond Ring by Nikkei Sale price¥158,000

Afghanite 0.333ct loose stone from Afghanistan, Japan-Germany Sale price¥8,800

Afghanite 0.447ct loose stone from Afghanistan, Japan-Germany Sale price¥8,800

Namibian Jeremejevite 0.194ct loose stone by Nikkei Sale price¥15,800

Burmese unheated ruby 0.245ct loose stone by Nikkei Sale price¥39,800

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.

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