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blue/blue gemstones

There are many gemstones that have blue or blue hues. Typical examples include sapphire, aquamarine, tanzanite, Paraiba tourmaline, blue topaz, iolite, lapis lazuli, and turquoise, but there are others as well. Even though it's a blue color, there are some that are more greenish and others that are more purple, and the impression changes depending on the shade and transparency, and the more you know about it, the more you want to collect it.

Karatz GemMagazine
" 10 Blue Gems "

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[Ref: 12564456] Mozambique Aquamarine 0.837ct Loose Stone

[Ref: 12564456] Mozambique Aquamarine 0.837ct Loose Stone Sale price¥9,800
【12564457掲載】シーブルーカルセドニー 2.001ctルース

[Item 12564457] Sea Blue Chalcedony 2.001ct Loose Stone Sale price¥18,800
[Item 12564624] Tanzanian Cobalt Spinel 0.094ct Loose Gemstone

[Item 12564624] Tanzanian Cobalt Spinel 0.094ct Loose Gemstone Sale price¥47,800
[Item 12564627] Bekily Blue Garnet (Color-Change Garnet) from Madagascar, 0.620ct Loose Stone

[Item 12564627] Bekily Blue Garnet (Color-Change Garnet) from Madagascar, 0.620ct Loose Stone Sale price¥69,800
[Item 12564325] Kenya Gold Sheen Sapphire (Star Sapphire) 0.477ct Loose Gemstone

[Item 12564325] Kenya Gold Sheen Sapphire (Star Sapphire) 0.477ct Loose Gemstone Sale price¥35,800
コンゴ産ヘミモルファイト 3.363ctルース

[Available 10/10 at 10 PM] Hemimorphite from Congo, 3.363ct loose stone Sale price¥18,800
マダガスカル産アパタイト 0.300ctルース

[Available Oct 10, 10:00 PM] Madagascar Apatite 0.300ct Loose Stone Sale price¥8,800
モザンビーク産アクアマリン 3.541ctルース

[10/11 10 PM Sale] Mozambique Aquamarine 3.541ct Loose Gemstone with Identification Report Sale price¥45,800
[10/13 10:00 PM Release] Tanzanian Cobalt Spinel 2.7mm/0.100ct Loose Stone with Identification Report

[10/13 10:00 PM Release] Tanzanian Cobalt Spinel 2.7mm/0.100ct Loose Stone with Identification Report Sale price¥39,800
タンザニア産コバルトスピネル 0.070ctルース

[Available 10/11 at 10 PM] Tanzanian Cobalt Spinel 2.3mm/0.070ct Loose Gemstone with Identification Report Sale price¥22,800
タンザニア産コバルトスピネル 0.053ctルース

[Available 10/9, 10 PM] Tanzanian Cobalt Spinel 2.1mm / 0.053ct Loose Gemstone with Identification Report Sale price¥19,800
ドミニカ共和国産ラリマー 3.420ctルース (ローズカット)

[Item 12564461] Dominican Republic Larimar 3.420ct Loose Gemstone Sale price¥12,800
ネパール産カイヤナイト 1.017ctルース

[Item 12564459] Nepalese Kyanite 1.017ct Loose Gemstone Sale price¥9,800
カシミール産非加熱サファイア 0.710ctルース

[Lottery Sale ②_202608_04] Unheated Kashmir Sapphire 0.710ct Loose Stone GIA Sale price¥298,000
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
ケニア産□ケニア産ゴールドシーンサファイア 0.859ctルース

[Item 12564332] Kenyan Gold Sheen Sapphire 0.859ct Loose Gemstone Sale price¥59,800
タンザニア産コバルトスピネル 3.6mm/0.187ctルース 日独産地鑑別

[Available 10/3 at 10 PM] Tanzanian Cobalt Spinel 3.6mm/0.187ct Loose Stone, JGL Origin Report Included Sale price¥98,000
アフガニスタン産アウイナイト 0.093ctルース

[10/3 10 PM Release] Afghan Hauyne 0.093ct Loose Stone Sale price¥22,800
アフガニスタン産アウイナイト 0.095ctルース

[10/3 10 PM Sale] Afghan Hauyne 0.095ct Loose Gemstone Sale price¥18,800
アフガニスタン産アウイナイト 0.067ctルース

[Available 10/3, 10:00 PM] Afghan Hauyne 0.067ct Loose Stone Sale price¥12,800
アフガニスタン産アウイナイト 0.082ctルース

[10/7 10:00 PM Release] Afghan Hauyne 0.082ct Loose Stone Sale price¥12,800
アフガニスタン産アウイナイト 0.226ctルース

[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

【Available 10/17 at 10 PM】 Afghan Hauyne 0.199ct Loose Stone Sale price¥22,800
アフガニスタン産アウイナイト 0.183ctルース

[Available 10/7 at 10 PM] Afghan Hauyne 0.183ct Loose Gemstone Sale price¥19,800
ブラジル産サンタマリアアクアマリン 0.318ctルース

[Available 10/3, 10:00 PM] Santa Maria Aquamarine from Brazil, 0.318ct loose stone, with certificate of authenticity Sale price¥29,800
[10/14 10:00 PM Release] Vietnamese Aquamarine 0.339ct Loose Stone

[10/14 10:00 PM Release] Vietnamese Aquamarine 0.339ct Loose Stone Sale price¥9,800
スリランカ産スピネル 3.419ctルース

[Deadline: 9/5 (Sat) 10 AM: Lottery Sale_11] Sri Lankan Blue Spinel 3.419ct Loose Stone with Identification Report Sale price¥158,000
マダガスカル産ロイヤルブルーサファイア 4.0mm/0.377ctルース 鑑別書

[Deadline: Mon, 9/14, 10:00 AM: Lottery Sale_07] Madagascar Royal Blue Sapphire 4.0mm/0.377ct Loose Stone with Identification Report Sale price¥69,800
スリランカ産非加熱カラーチェンジサファイア 1.170ctルース

[Deadline: Sat, Sep 5, 10:00 AM: Lottery Sale_09] Sri Lankan Unheated Color-Change Sapphire 1.170ct Loose Stone, GIA certified Sale price¥188,000
ロイヤルブルーサファイア 0.530ctルース AIGS

Royal Blue Sapphire 0.530ct Loose Stone Sale price¥69,800
アンデシン・ラブラドライト（通称名 ブルームーンストーン） 4.518ctルース

[Available 9/27 at 10 PM] Madagascar Andesine-Labradorite (Common name: Blue Moonstone) 4.518ct Loose Stone Sale price¥29,800
ピクチャーアゲート 8.321ctルース

[Available 9/26 at 10 PM] Picture Agate 8.321ct Loose Stone Sale price¥9,800
ネパール産カイヤナイト 1.216ctルース

[Available 9/30 at 10 PM] Nepal Kyanite 1.216ct Loose Gemstone (Royal Blue Color) Sale price¥15,800
ティールブルーサファイア 0.555ctルース

[Available 10/1 at 10 PM] Australian Teal Blue Sapphire 0.555ct Loose Stone Sale price¥19,800
ブルーダイヤモンド 0.064ctルース(FANCY LIGHT GREEN BLUE, VS-1)

[9/14 (Mon) 10:00 AM Deadline: Lottery Sale_05] Blue Diamond 0.064ct Loose Stone (FANCY LIGHT GREEN BLUE, VS-1) Sale price¥298,000
ナミビア産ジェレメジェバイト 0.061ctルース

[Available 9/30 at 10:00 PM] Jeremejevite from Namibia, 0.061ct loose stone, with identification report Sale price¥15,800
ナミビア産ジェレメジェバイト 0.054ctルース

[Available 9/19 at 10 PM] Jeremejevite from Namibia, 0.054ct loose stone with identification report Sale price¥14,800
ナミビア産ジェレメジェバイト 0.053ctルース

[9/19 10 PM Sale] Jeremejevite from Namibia 0.053ct Loose Stone with Appraisal Report Sale price¥14,800
ナミビア産ジェレメジェバイト 0.045ctルース

[Available 9/19 at 22:00] Jeremejevite from Namibia, 0.045ct Loose Stone with Identification Report Sale price¥15,800
アフガニスタン産アフガニスタン産ラズライトインソーダライト 0.425ctルース

[Available 9/18 10:00 PM] Lazulite in Sodalite from Afghanistan 0.425ct Loose Gemstone Sale price¥9,800
ナイジェリア産グリーンベリル 0.311ctルース

[Available 9/21, 10:00 PM] Nigerian Green Beryl 0.311ct Loose Gemstone Sale price¥7,980
ブラジル産バイカラートパーズ 3.098ctルース

[Available 9/21, 10:00 PM] Brazilian Bicolor Topaz 3.098ct Loose Gemstone Sale price¥29,800
ブラジル産バイカラートパーズ 1.932ctルース

[Available 9/27 at 10 PM] Brazilian Bicolor Topaz 1.932ct Loose Stone Sale price¥19,800
アクアマリン 0.424ctルース

[Available 9/29 at 10:00 PM] Mozambique Aquamarine 0.424ct Loose Gemstone Sale price¥7,980
ナミビア産ジェレメジェバイト 0.158ctルース

Namibian Jeremejevite 0.158ct loose stone Sale price¥29,800
ナミビア産ジェレメジェバイト 0.405ctルース

Namibian Jeremejevite 0.405ct loose stone Sale price¥79,800
ナミビア産ジェレメジェバイト 0.394ctルース

Namibian Jeremejevite 0.394ct loose stone Sale price¥79,800
非加熱ブラジル産パライバトルマリン 0.051ctルース（CuO:2.0%、MnO:2.3%）

Unheated Brazilian Paraiba Tourmaline 0.051ct loose stone (CuO: 2.0%, MnO: 2.3%) 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.

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.