Coming soon

[On sale June 2nd, 10 PM] Spanish Sphalerite 4.445ct Loose Stone Sale price¥79,800

[Sales start June 2nd, 10 PM JST] Diamond 3.7mm/0.184ct Loose Stone (D, VS-1, VeryGood) Sale price¥33,800

[On sale June 2 at 10 PM] Loose Diamond 3.7mm/0.197ct (H, VS-1, Good) Sale price¥29,800

[On sale June 5th at 10 PM] Russian Demantoid Garnet (Horsetail inclusion confirmed) 6.9mm/1.589ct Loose Stone with Appraisal Report Sale price¥458,000

[Sales start June 5th, 10 PM] Russian Demantoid Garnet (horsetail inclusion visible) 6.8mm/1.366ct Loose Stone with Appraisal Report Sale price¥398,000

[On sale June 4th at 10 PM] Diamond 3.7mm/0.194ct Loose (H, VS-2, Excellent) Sale price¥35,800

[On Sale June 4th, 10 PM JST] Diamond 3.7mm/0.190ct Loose (E, VVS-2, VeryGood) Sale price¥34,800

[Sale from 10 PM on June 4th] Diamond 3.5mm/0.145ct Loose (F, VS-1, VeryGood) Sale price¥26,800

[On sale June 6th at 10 PM] Brazilian Rubellite 2.793ct Loose Stone with Certificate Sale price¥59,800

[Sales begin June 6th, 10 PM JST] Diamond 3.3mm/0.172ct Loose (G, VS-1, Flanders Cut) Sale price¥45,800

[Sales begin June 6, 10 PM JST] Diamond 3.7mm/0.192ct Loose (F, VVS-2, VeryGood) Sale price¥39,800

[On sale June 6, 10 PM JST] Brazilian Seafoam Tourmaline 0.334ct Loose Stone Sale price¥16,800

[On sale June 5th, 10 PM] Colombian Euclase 2.365ct Loose Stone Sale price¥59,800

[On sale June 5th at 10 PM] Brazilian Alexandrite 0.128ct Loose Stone Sale price¥29,800

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

Amethyst 4.249ct rough stone Sale price¥4,980

[Sale on June 6 at 10 PM] Pyrite in Emerald from Chivor Mine, Colombia, 4.221 ct Loose Stone Sale price¥98,000

[On sale June 7, 10 PM] Untreated Blue Sapphire 2.430ct Loose Gemstone GIA Sale price¥258,000

[On sale June 7th at 10 PM] Colombian Trapiche Emerald, 1.874ct Loose Stone, with Identification Report Sale price¥69,800

[On Sale June 7, 10 PM] 0.210ct Untreated Colombian Emerald Loose Stone, GIA Certified Sale price¥228,000

Mexican Opal 0.854ct Loose Sale price¥5,980

[On sale June 6th, 10 PM JST] Cambodian Blue Zircon (Ratanakiri Blue) 1.455ct Loose Stone with Gemological Report Sale price¥22,800

[Sales start 10 PM on 6/6] Madagascar Labradorite 0.823ct Loose Gemstone Sale price¥7,980

[On sale June 6th, 10 PM] Nepal Kyanite 2.906ct Loose Stone with Certificate Sale price¥19,800

[On sale June 6th at 10 PM JST] Peruvian Gem Silica (Chrysocolla Chalcedony) 3.210ct Loose Stone, GIA & JGGL Certified Sale price¥19,800

[On sale June 6th, 10 PM JST] Peruvian Gem Silica (Chrysocolla Chalcedony) 4.098ct Loose Stone with Japan-Germany Gemological Report Sale price¥24,800

[Sale on 6/6 at 10 PM JST] Peruvian Gem Silica (Chrysocolla Chalcedony) 2.556ct Loose Stone with Japan-Germany Gemstone Report Sale price¥15,800

[On sale June 6th at 10 PM] Malawi Moonstone (Malawi Moonstone) 2.428 ct Loose Sale price¥18,800

[On sale June 6, 10 PM JST] Malawi Moonstone 2.233ct Loose Stone Sale price¥15,800

[Sale on June 6 at 10 PM] Malawi Moonstone (Malawi Moonstone) 2.209 ct loose stone Sale price¥15,800

[On sale June 6th at 10 PM] Malawi Moonstone 2.201ct Loose Stone Sale price¥15,800

[Sale at 10 PM on June 6] Malawi Moonstone 1.661ct Loose Stone Sale price¥12,800

ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 7.682ctルース

[On sale 10 PM, June 6] Brazil Tinkerbell Quartz (Pink Fire Quartz) 7.682ct Loose Stone Sale price¥15,800

Tanzanian pink tourmaline 0.558ct loose stone Sale price¥9,800

Brazilian pink tourmaline 0.968ct loose stone Sale price¥18,800

Brazilian Pink Tourmaline 0.470ct Loose Stone Sale price¥9,800

Brazilian dendritic quartz 4.587ct loose stone Sale price¥9,800

アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.585ctルース

Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.585ct loose stone Sale price¥12,800

Spessartite Garnet from Madagascar 1.053ct loose stone Sale price¥29,800

South African diamond rough (sawable) 0.085ct rough Sale price¥15,800

South African diamond rough (sawable) 0.110ct rough Sale price¥22,800

American Red Beryl 0.132ct Loose Sale price¥33,800

非加熱ブラジル産パライバトルマリン 0.065ctルース（CuO:1.6%、MnO:2.4%）

0.065ct loose Paraiba tourmaline from Brazil (CuO: 1.6%, MnO: 2.4%) Sale price¥49,800

American Red Beryl 0.147ct Loose Sale price¥35,800

Myanmar Violet Spinel 0.426ct Loose Sale price¥8,800

[12551148] Australian black opal 3.890ct loose stone Sale price¥69,800

Mica in Quartz 0.758ct Loose Stone Sale price¥5,980

[12552306] Iolite 14.158ct loose stone Sale price¥258,000

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.

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.