Vertical: 5.1 - 6.0mm

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

Brazilian Green Tourmaline 0.703ct Loose Stone Sale price¥15,800

[Deadline: Wed, Sept 22 at 10 AM: Lottery Sale_09] Parasitic Peridot 0.536ct Loose Stone, NGL Certified Sale price¥228,000

Brazilian Bicolor Pink Euclase 0.236ct Loose Stone, Japan-Germany Sale price¥110,000

【11/2 22時販売】スリランカ産ブルーサファイア 0.518ctルース鑑別書 Sale price¥29,800

Brazilian Green Tourmaline 0.350ct Loose Sale price¥8,800

【10/27 22時販売】ナイジェリア産グリーンベリル 0.306ctルース Sale price¥7,980

【10/28 22時販売】タンザニア産タンザナイト 0.537ctルース Sale price¥15,800

【10/28 22時販売】タンザニア産タンザナイト 0.559ctルース Sale price¥15,800

[Item 12564468] Australian Black Opal 0.306ct Loose Stone Sale price¥25,800

マダガスカル産ベキリーブルーガーネット（カラーチェンジガーネット） 0.464ctルース

[Item 12564681] Bekily Blue Garnet (Color Change Garnet) from Madagascar, 0.464ct Loose Gemstone Sale price¥59,800

[12565162 Listed] Spessartine Garnet from Tanzania 0.739ct Loose Gemstone Sale price¥25,800

[Item 12565148] Ruby 0.552ct Loose Stone Sale price¥14,800

[12560786] Nigerian Green Beryl 0.621ct Loose Stone Sale price¥8,800

Brazilian Mint-Colored Tourmaline 0.294ct Loose Stone Sale price¥15,800

Zambian Emerald 0.188ct Loose Stone Sale price¥9,800

Australian Black Opal 0.421ct Loose Stone Sale price¥18,800

[Available Oct 10, 10:00 PM] Madagascar Apatite 0.300ct Loose Stone Sale price¥8,800

[10/10 10:00 PM Release] Turkish Diopside 0.450ct Loose Stone Sale price¥9,800

[Ref: 12564306] Brazilian Emerald Cat's Eye 0.582ct Loose Gemstone Sale price¥22,800

[Item 12564332] Kenyan Gold Sheen Sapphire 0.859ct Loose Gemstone Sale price¥59,800

[Lottery Sale_01][For Winners Only][Item 12564184] East African Unheated Bicolor Sapphire 0.510ct Loose GIA Sale price¥98,000

[Available 10/3, 10:00 PM] Santa Maria Aquamarine from Brazil, 0.318ct loose stone, with certificate of authenticity Sale price¥29,800

[Available Oct 11, 10 PM] Colombian Pyrite and Mica in Emerald 0.432ct Loose Stone with Identification Report Sale price¥35,800

[On sale 10/8 at 22:00] Phenakite from Malyshevo, Russia, 0.366ct loose stone Sale price¥18,800

[Available 10/5 at 10:00 PM] Tanzanian Rhodolite Garnet 0.510ct Loose Stone Sale price¥9,800

[10/14 10:00 PM Release] Vietnamese Aquamarine 0.339ct Loose Stone Sale price¥9,800

Royal Blue Sapphire 0.530ct Loose Stone Sale price¥69,800

[Listing 12556682] Zambian Emerald 0.202ct Loose Stone Sale price¥15,800

[Item 12563638] Tanzanian Bicolor Grossular Garnet 0.904ct Loose Stone Sale price¥25,800

[Lottery Sale 0818_12] Loose 0.251ct Red Beryl (USA) with Certificate Sale price¥98,000

【Listed as 12564080】Brazilian unheated purple-pink imperial topaz 0.343ct loose gemstone Sale price¥49,800

[9/26 10:00 PM Release] Sri Lankan Green Zircon 0.702ct Loose Stone Sale price¥14,800

[Available 9/20 at 10 PM] Synthetic Alexandrite 0.657ct Loose Stone Sale price¥14,800

[Available 9/24 at 10 PM] Australian Black Opal 0.322ct Loose Gemstone Sale price¥16,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.328ctルース

[Available 9/25 at 10 PM] Madagascar Andesine-Labradorite (Common name: Rainbow Moonstone) 0.328ct Loose Stone Sale price¥9,800

[Available Sept 21, 10 PM] Brazilian Mint Color Emerald 0.451ct Loose Stone Sale price¥15,800

[Available 9/29 at 10:00 PM] Mozambique Aquamarine 0.424ct Loose Gemstone Sale price¥7,980

American Herkimer Diamond 5.6mm/0.516ct Loose Sale price¥8,800

Colombian Trapiche Emerald 0.299ct Loose Sale price¥16,800

[202608GIA Appraisal Request] [Sale on June 5th at 10 PM] Russian Demantoid Garnet (with horsetail inclusion) 5.8mm/0.876ct Loose Stone with Appraisal Report Sale price¥258,000

Russian Demantoid Garnet (Horsetail Recognized) 5.1mm/0.664ct Loose Stone Sale price¥228,000

[202608GIA Appraisal Request] Russian Demantoid Garnet (horsetail inclusion confirmed) 5.2mm/0.661ct Loose Stone Sale price¥248,000

[9/15 10 PM Release] Brazilian Goshenite 0.358ct Loose Gemstone Sale price¥8,800

[Available 9/15, 10 PM] Tanzanian Blue Spinel 0.449ct Loose Gemstone with Identification Report Sale price¥12,800

[9/13 10:00 PM Release] Spanish Pink Cobalt Calcite 0.523ct Loose Stone with Gem Identification Report Sale price¥39,800

[Available 9/13, 10:00 PM] Spanish Pink Cobalt Calcite 0.443ct Loose Stone with Identification Report Sale price¥35,800

【Available 9/17 at 10:00 PM】 Phenakite from Malyshevo, Russia, 0.510ct loose stone, JGL certified Sale price¥15,800

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.