Bicolor/Party color system

Some gemstones exhibit multiple colors within a single stone; two colors are called bicolor, three colors are tricolor, and multiple colors are called particolor. Some are clearly separated, while others have a gradation, so I think these are gemstones that give you a sense of their individuality.

Karatz GemMagazine
" Bicolor gemstone "

[On sale at 22:00 on 6/8] Bicolor sapphire 5.640ct loose stone with certificate Sale price¥98,000

[On sale at 22:00 on 6/7] Dendritic Opal 3.041ct Loose Sale price¥18,800

[On sale at 22:00 on 6/8] Pakistani axinite (green tint) 1.389ct loose stone Sale price¥39,800

[On sale at 22:00 on 6/8] Afghanistan Lazurite in Sodalite 2.387ct loose stone Sale price¥39,800

[On sale at 22:00 on 6/8] Afghanistan Lazurite in Sodalite 0.581ct loose stone Sale price¥18,800

[On sale at 22:00 on 6/8] Afghanistan Lazurite in Sodalite 0.551ct loose stone Sale price¥18,800

[On sale from 10pm on 5/31] Brazilian Lepidocrocite in Quartz 9.0mm/2.735ct loose stone Sale price¥14,800

[On sale at 22:00 on 6/10] Brazilian Dumortierite in Quartz 3.240ct loose stone Sale price¥15,800

[On sale from 10pm on 5/27] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.794ct loose stone Sale price¥15,800

[On sale from 10pm on 5/16] Mexican Cantera Opal 6.112ct loose stone Sale price¥59,800

[On sale 6/7 at 22:00] Mexican Cantera Opal 14.458ct loose stone (faceted cut) Sale price¥14,800

[On sale at 22:00 on 6/7] Synthetic opal 2.026ct loose stone Sale price¥19,800

Afghanistan Bicolor Tourmaline 1.653ct Loose Stone Sale price¥49,800

[On sale at 22:00 on 5/13] Synthetic black opal 5.013ct loose stone Sale price¥59,800

[On sale from 22:00 on 5/6] Tanzanian bicolor zoisite 2.270ct loose stone Sale price¥45,800

[On sale from 10pm on 5/16] Mexican fire opal (faceted cut) 0.387ct loose stone Sale price¥14,800

[On sale at 22:00 on 5/29] Synthetic black opal 2.996ct loose stone Sale price¥29,800

[On sale at 22:00 on 5/13] Montana sapphire 0.370ct loose stone Sale price¥9,800

[On sale at 22:00 on 4/13] Tanzanian bicolor zoisite 0.716ct loose stone Sale price¥9,800

[On sale at 22:00 on 4/17] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.783ct loose stone Sale price¥15,800

[On sale at 22:00 on 4/11] Brazilian Paraiba Tourmaline in Quartz 0.712ct loose stone Sale price¥15,800

[On sale from 10pm on 5/15] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.676ct loose stone Sale price¥15,800

[On sale at 22:00 on 4/17] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.728ct loose stone Sale price¥12,800

[On sale from 10pm on 5/15] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.718ct loose stone Sale price¥18,800

[On sale at 22:00 on 4/13] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.735ct loose stone Sale price¥15,800

[On sale at 10pm on 4/29] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.751ct loose stone Sale price¥15,800

[On sale at 22:00 on 4/13] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.704ct loose stone Sale price¥15,800

[On sale from 10pm on 4/17] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.656ct loose stone Sale price¥15,800

[On sale from 10pm on 4/11] [Cat cut (leopard print)] Amber 8.0mm/0.664ct loose stone Sale price¥9,800

[On sale at 22:00 on 4/17] Synthetic black opal 1.209ct loose stone Sale price¥18,800

Ethiopian Opal 6.0mm/0.584ct Loose Sale price¥12,800

Brazilian bicolor tourmaline 4.291ct loose stone Sale price¥55,800

Brazilian bicolor tourmaline 6.227ct loose stone Sale price¥69,800

【さくらシェイプ】ブラジル産アメトリン 20mm/21.554ct《コラボ》ルース　ワッペン

[Sakura Shape] Brazilian Ametrine 20mm/21.554ct {Collaboration} Loose Patch Sale price¥98,000

Brazilian Pink Tourmaline 0.772ct Loose Stone Sale price¥12,800

Tanzanian bicolor sapphire 0.658ct loose stone Sale price¥14,800

Tanzanian bicolor sapphire 0.950ct loose stone Sale price¥25,800

Tanzanian bicolor sapphire 0.707ct loose stone Sale price¥18,800

Tanzanian bicolor sapphire 0.598ct loose stone Sale price¥16,800

Tanzanian bicolor sapphire 0.923ct loose stone Sale price¥25,800

Tanzanian bicolor sapphire 0.571ct loose stone Sale price¥15,800

Tanzanian bicolor sapphire 0.623ct loose stone Sale price¥16,800

Brazilian Medusa Quartz (Paraiba Quartz) 2.147ct loose stone Sale price¥6,980

Brazilian Medusa Quartz (Paraiba Quartz) 2.117ct loose stone Sale price¥6,980

Brazilian bicolor tourmaline 0.891ct loose stone Sale price¥9,800

Oregon Sunstone from the United States 11m/4.056ct loose stone (vortex cut) Sale price¥39,800

Afghanistan Bicolor Tourmaline 0.672ct Loose Stone Sale price¥9,800

Afghanistan Bicolor Tourmaline 0.471ct 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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.

KARATZ・Five Commitments