Vertical: 3.1 - 4.0mm

[Deadline: Tue, Oct 13, 10:00 AM: Lottery Sale_09] Russian Alexandrite 0.150ct Loose Stone GIA Sale price¥178,000

Colombian emerald 3.5mm/0.150ct loose stone Sale price¥22,800

[Sun, Oct 4, 10:00 AM Deadline: Lottery Sale #2_07] Kashmir Unheated Sapphire 3.2mm/0.190ct Loose Stone GIA Sale price¥128,000

ブラジル産パライバトルマリン 3.2mm/0.152ctルース（CuO:1.1% MnO:0.6%）

[Deadline: Mon, 9/14, 10:00 AM: Lottery Sale_06] Brazilian Paraiba Tourmaline 3.2mm/0.152ct Loose Stone (CuO: 1.1% MnO: 0.6%) Sale price¥158,000

Sri Lankan Blue Sapphire 0.226ct Loose Sale price¥14,800

ダイヤモンド 3.7mm/0.200ctルース(E, VS-2, 3Excellent) GIA

[Deadline: Sat, Oct 3, 10:00 AM: Lottery Sale ①_01] Diamond 3.7mm/0.200ct Loose Stone (E, VS-2, 3Excellent) GIA Sale price¥35,800

[Deadline: Sun, Oct 4, 10:00 AM: Lottery Sale ②_04] Myanmar Musgravite 0.080ct Loose Stone GIT Sale price¥178,000

Diamond (cabochon cut) 0.183ct loose Sale price¥24,800

Kenyan Gold Sheen Sapphire 3.6mm/0.302ct Loose Stone Sale price¥29,800

Kenyan Gold Sheen Sapphire 3.5mm/0.273ct Loose Stone Sale price¥19,800

非加熱ブラジル産パライバトルマリン 0.068ctルース（CuO:1.4%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.068ct loose stone (CuO: 1.4%, MnO: 2.3%) Sale price¥45,800

【11/3 22時販売】アフガニスタン産ハックマナイト 0.148ctルース Sale price¥22,800

【11/3 22時販売】ケニア産非加熱ゴールドシーンサファイア 0.269ctルース鑑別書 Sale price¥19,800

Brazilian Lazurite (Azurite) 0.071ct loose stone Sale price¥22,800

【10/29 22時販売】ナイジェリア産グリーンベリル 4.0mm/0.232ctルース Sale price¥6,980

【10/29 22時販売】スリランカ産サファリン 0.149ctルース鑑別書 Sale price¥19,800

【10/29 22時販売】スリランカ産サファリン 0.143ctルース鑑別書 Sale price¥18,800

【10/29 22時販売】スリランカ産サファリン 0.148ctルース鑑別書 Sale price¥19,800

【10/27 22時販売】スリランカ産サファリン 3.1mm/0.143ctルース鑑別書 Sale price¥19,800

【10/27 22時販売】スリランカ産サファリン 3.9mm/0.212ctルース鑑別書 Sale price¥19,800

[Available 10/18 at 10 PM] Ruby 0.185ct Loose Stone with Appraisal Report Sale price¥12,800

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） 0.231ctルース

[Item 12565145] Bekily Blue Garnet (Color Change Garnet) from Madagascar, 0.231ct loose stone Sale price¥22,800

[Item No. 12564322] Burmese Red Spinel 0.176ct Loose Gemstone Sale price¥17,800

ケニア産非加熱ゴールドシーンサファイア（スターサファイア） 4.0mm/0.477ctルース鑑別書

[Item 12564325] Kenya Gold Sheen Sapphire (Star Sapphire) 0.477ct Loose Gemstone Sale price¥35,800

[Item 12564248] Madagascar Sapphire 0.385ct Loose Stone Sale price¥18,800

【Available 10/12 at 10:00 PM】 Pakistani Vayrynenite 0.075ct Loose Stone Sale price¥16,800

[Available 10/12 at 10 PM] Pakistani Vayrynenite 0.067ct Loose Gemstone Sale price¥14,800

[10/12 10 PM Release] Vayrynenite from Pakistan, 0.064ct Loose Gemstone Sale price¥14,800

[Available 10/14 at 10 PM] Russian Demantoid Garnet (horsetail inclusions visible) 0.206ct Loose Gemstone Sale price¥79,800

[Item 12564612] Unheated Bicolor Sapphire from Windsor, Tanzania, 0.620ct Loose Gemstone Sale price¥75,800

[Sat, Sep 5, 10:00 AM Deadline: Lottery Sale_10] Colombian Non-Oiled Emerald 0.290ct Loose Stone GIA Sale price¥178,000

[12563017 listed] Pink Sapphire 0.143ct Loose Stone Sale price¥12,800

ケニア産ケニア産ゴールドシーンサファイア（スターサファイア） 0.311ctルース

[Item 12564329] Kenyan Gold Sheen Sapphire (Star Sapphire) 0.311ct Loose Stone Sale price¥24,800

インターナリーフローレスダイヤモンド 3.7mm/0.238ctルース(E, IF)

[Deadline: Wed, 9/22, 10:00 AM: Lottery Sale_11] Internally Flawless Diamond 3.7mm/0.238ct Loose Stone (E, IF) Sale price¥59,800

【10/3 10 PM Release】Unheated Bicolor Sapphire from Winza, Tanzania 0.500ct Loose Gemstone with Identification Report Sale price¥59,800

[Available 10/2 at 10 PM] Unheated Bicolor Sapphire from Winza, Tanzania, 0.460ct Loose Stone with Gem Identification Report Sale price¥59,800

[Available 10/3 at 10 PM] Tanzanian Cobalt Spinel 3.6mm/0.187ct Loose Stone, JGL Origin Report Included Sale price¥98,000

[Available 10/3, 10 PM] Pakistan Vayrynenite 0.076ct Loose Gemstone Sale price¥16,800

[10/3 10 PM Sale] Afghan Hauyne 0.095ct Loose Gemstone Sale price¥18,800

[10/7 10:00 PM Release] Afghan Hauyne 0.082ct Loose Stone Sale price¥12,800

[Available 10/2 at 10 PM] Mozambique Paraiba Tourmaline 0.135ct Loose Stone Sale price¥7,980

[Available 10/2, 10:00 PM] Mozambique Paraiba Tourmaline 0.096ct Loose Gemstone Sale price¥6,980

[10/3 10 PM Sale] Colombian Emerald 0.126ct Loose Gemstone with Appraisal Report Sale price¥39,800

[Available Oct 4, 10 PM] Synthetic Alexandrite 0.264ct Loose Gemstone Sale price¥9,800

[Item 12564511] Russian Alexandrite 0.103ct Loose Stone Sale price¥128,000

[9/27 10:00 PM Release] Colombian Emerald 0.079ct Loose Stone Sale price¥8,800

[9/27 10:00 PM Release] Colombian Emerald 0.121ct Loose Stone Sale price¥15,800

[Available 10/7, 10:00 PM] Colombian Emerald 0.145ct Loose Stone Sale price¥35,800

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.