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 10 PM on August 17th] Mexican Cantera Opal 2.125ct Loose Sale price¥39,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.708ct Loose Stone Sale price¥15,800

Mexican Cantera Opal 8.331ct Loose Sale price¥39,800

Mexican Cantera Opal 11.885ct Loose Sale price¥49,800

Brazilian Paraiba Tourmaline in Quartz 6mm/0.684ct Loose Stone Sale price¥15,800

Bicolor sapphire 0.970ct loose stone Sale price¥25,800

Brazilian bicolor tourmaline 1.032ct loose stone Sale price¥25,800

Zimbabwe Bicolor Euclase 3.5mm/0.192ct Loose Stone Sale price¥39,800

Zimbabwe Bicolor Euclase 3.0mm/0.108ct Loose Stone Sale price¥22,800

Bicolor sapphire 0.301ct loose Sale price¥18,800

[On sale 7/3 at 22:00] Madagascar bicolor sapphire 0.232ct loose stone Sale price¥15,800

[On sale 7/3 at 22:00] Madagascar bicolor sapphire 0.188ct loose stone Sale price¥12,800

Brazilian bicolor topaz 2.618ct loose stone (untreated) Sale price¥18,800

Spanish Sphalerite 5.6mm/0.956ct loose stone Sale price¥14,800

Bicolor Sapphire 5.640ct Loose Stone with Certificate Sale price¥98,000

Dendritic Opal 3.041ct Loose Sale price¥18,800

Pakistani Axinite (Green Tint) 1.389ct Loose Stone Sale price¥39,800

Afghanistan Lazurite in Sodalite 2.387ct Loose Stone Sale price¥39,800

Afghanistan Lazurite in Sodalite 0.581ct Loose Stone Sale price¥18,800

Brazilian Lepidocrocite in Quartz 9.0mm/2.735ct Loose Stone Sale price¥14,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.794ct Loose Stone Sale price¥15,800

Mexican Cantera Opal 6.112ct Loose Sale price¥59,800

Mexican Cantera Opal 14.458ct loose stone (faceted cut) Sale price¥14,800

Synthetic Opal 2.026ct Loose Sale price¥19,800

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

[On sale from 10pm on 5/18] Malawi bicolor zircon 0.621ct loose stone Sale price¥29,800

Synthetic Black Opal 5.013ct Loose Sale price¥59,800

Synthetic black opal 2.996ct loose stone Sale price¥29,800

Montana sapphire 0.370ct loose stone Sale price¥9,800

Tanzania Bicolor Zoisite 0.716ct Loose Stone Sale price¥9,800

Tanzanian bicolor tanzanite 0.815ct loose stone Sale price¥11,000

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.783ct Loose Stone Sale price¥15,800

Brazilian Paraiba Tourmaline in Quartz 0.712ct Loose Stone Sale price¥15,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.676ct Loose Stone Sale price¥15,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.728ct Loose Stone Sale price¥12,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.718ct Loose Stone Sale price¥18,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.735ct Loose Stone Sale price¥15,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.723ct Loose Stone Sale price¥15,800

[On sale from 10pm on 5/15] Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.665ct loose stone Sale price¥15,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.751ct Loose Stone Sale price¥15,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.704ct Loose Stone Sale price¥15,800

Brazilian Paraiba Tourmaline in Quartz 6.0mm/0.656ct Loose Stone Sale price¥15,800

[Cat cut (leopard print)] Amber 8.0mm/0.664ct loose stone Sale price¥9,800

Synthetic black opal 1.209ct loose stone Sale price¥18,800

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

Malawi Bicolor Zircon 1.223ct Loose Stone Sale price¥55,800

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

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

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の取り組みと社会貢献

業界発展のための後進育成や事業協力、宝石の国スリランカの子どもたちへの支援活動など、KARATZの取り組みについてご紹介いたします。

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.