Width: 3.1 - 4.0mm

Opal 0.123ct loose stone Sale price¥5,980

カメレオンダイヤモンド 0.226ctルース(FANCY LIGHT GRAY GREENISH YELLOW（カメレオン）, VS2)

[Deadline: Sat, Aug 29, 10:00 AM | Lottery Sale] Chameleon Diamond 0.226ct Loose Stone (FANCY LIGHT GRAY GREENISH YELLOW (Chameleon), VS-2) Sale price¥45,800

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

[Lottery Sale_12][For Winners Only][Item 12564216] Alexandrite from Odisha, India, 0.360ct Loose Stone, GIA Sale price¥98,000

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

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

【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】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） 0.349ctルース Sale price¥39,800

【11/3 22時販売】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） 0.398ctルース Sale price¥49,800

【11/3 22時販売】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） 0.365ctルース Sale price¥42,800

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

【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

【10/27 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

【10/29 22時販売】スリランカ産サファリン 0.245ctルース鑑別書 Sale price¥29,800

【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

【10/27 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

[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

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

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） 0.620ctルース鑑別書

[Item 12564627] Bekily Blue Garnet (Color-Change Garnet) from Madagascar, 0.620ct Loose Stone Sale price¥69,800

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

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

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 10/14 at 22:00] Russian Emerald 0.247ct Loose Gemstone Sale price¥49,800

[Item 12564459] Nepalese Kyanite 1.017ct Loose Gemstone Sale price¥9,800

[Ref: 12564102] Pink Sapphire from Sri Lanka, 0.142ct loose stone Sale price¥9,800

[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

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

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

[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] Pakistani Väyrynenite 0.095ct Loose Gemstone Sale price¥19,800

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

[Available 10/10 at 22:00] Afghan Hauyne 0.226ct Loose Gemstone Sale price¥18,800

【Available 10/17 at 10 PM】 Afghan Hauyne 0.199ct Loose Stone Sale price¥22,800

[10/3 10 PM Sale] Colombian Emerald 0.211ct Loose Gemstone with Identification Report Sale price¥59,800

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

[10/5 10:00 PM Release] Australian Black Opal 0.261ct Loose Stone Sale price¥9,800

[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

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.