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 "

【11/30 22時販売】ブラジル産バイカラートルマリン 0.644ctルース Sale price¥9,800

【11/30 22時販売】ブラジル産バイカラートルマリン 1.046ctルース Sale price¥15,800

【11/24 22時販売】ブラジル産バイカラートルマリン 1.953ctルース Sale price¥18,800

[12555991] Synthetic opal 0.723ct loose stone Sale price¥15,800

[On sale 11/3 at 22:00] Brazilian bicolor tourmaline 0.914ct loose stone Sale price¥12,800

[11/2 22:00 Sale] Australian Opal 6.799ct Loose Stone, Japan-Germany Exchange Sale price¥59,800

[On sale at 10pm on 10/25] Tanzanian bicolor zoisite 0.320ct loose stone Sale price¥7,980

[On sale at 10pm on 10/26] Brazilian bicolor tourmaline 0.675ct loose stone Sale price¥9,800

[On sale at 10pm on 10/22] Brazilian bicolor tourmaline 0.820ct loose stone Sale price¥25,800

【甲州貴石切子】ブラッドショットアイオライトサンストーン 2.450ctルース《コラボ》ワッペン付

[On sale from 10/20 at 10pm] [Koshu Precious Stones Cut] Indian Bloodshot Iolite Sunstone 2.450ct Loose Stone [Collaboration] Patch Sale price¥55,800

[On sale at 10pm on 10/20] Colombian emerald 3.1mm/0.097ct loose stone Sale price¥22,800

[On sale at 10pm on 10/19] Oregon Sunstone from the USA 11mm/4.05ct loose stone (vortex cut) Sale price¥39,800

[On sale at 10pm on 10/19] Brazilian Ametrine 1.56ct loose stone Sale price¥9,800

[On sale at 10pm on 10/22] Australian Opal 1.916ct Loose Sale price¥8,800

[On sale at 10pm on 10/22] Australian Opal 3.639ct Loose Sale price¥14,800

[On sale at 10pm on 10/20] Bicolor tourmaline 0.840ct loose stone Sale price¥22,800

[On sale at 10/12 22:00] Sri Lankan bicolor sapphire 1.090ct loose stone Sale price¥39,800

[On sale 10/13 at 22:00] Brazilian bicolor tourmaline cat's eye 22.056ct loose stone Sale price¥198,000

[On sale at 10pm on 14th October] 3.429ct loose bi-color tourmaline from Congo Sale price¥128,000

[On sale at 10pm on 10/17] Brazilian Limonite in Topaz 3.399ct loose stone Sale price¥8,800

Brazilian bicolor tourmaline 0.326ct loose stone Sale price¥8,800

《Yurakucho Marui 2024112 takeout》Brazilian Limonite in Topaz 6.829ct loose stone Sale price¥17,800

Brazilian Limonite in Topaz 5.709ct loose stone Sale price¥9,800

Sri Lankan bicolor sapphire 0.495ct loose stone Sale price¥18,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 1.561ctルース

Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture, 1.561ct loose stone Sale price¥14,800

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 2.895ctルース

Rainbow Garnet (Andradite Garnet) 2.895ct Loose Stone from Tenkawa Village, Nara Prefecture Sale price¥25,800

Bicolor tourmaline 1.639ct loose stone Sale price¥29,800

ブラジル産ポンポンクォーツ（ラジエーテッドクリスタルインクォーツ） 7.686ctルース

Brazilian Pompon Quartz (Radiated Crystal in Quartz) 7.686ct Loose Sale price¥15,800

ブラジル産ポンポンクォーツ（ラジエーテッドクリスタルインクォーツ） 3.913ctルース

Brazilian Pompon Quartz (Radiated Crystal in Quartz) 3.913ct Loose Stone Sale price¥9,800

Oregon Sunstone from the United States 1.625ct loose stone Sale price¥29,800

Bicolor Benitoite 0.601ct Loose Japanese-German Edition Sale price¥458,000

Brazilian parti-color tourmaline 2.702ct loose stone Sale price¥69,800

ブラジル産非加熱バイカラーパライバトルマリン 0.220ctルース(CuO:2.7%、MnO:3.2%) GIA

Brazilian unheated bicolor Paraiba tourmaline 0.220ct loose stone (CuO: 2.7%, MnO: 3.2%) GIA Sale price¥198,000

Brazilian unheated bicolor Paraiba tourmaline 0.178ct loose stone (CuO: 0.9%, MnO: 2.8%) Sale price¥298,000

アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 2.736ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 2.736ct loose stone Sale price¥79,800

アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 3.512ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 3.512ct Loose Sale price¥98,000

アフガニスタン産バイカラートルマリン（通称名：バイカラールベライト） 2.888ctルース

Afghanistan Bicolor Tourmaline (also known as Bicolor Rubellite) 2.888ct Loose Sale price¥88,000

Chinese bicolor fluorite 6.274ct loose stone Sale price¥8,800

Argentine bicolor fluorite 11.226ct loose stone Sale price¥6,980

Bicolor Tourmaline 13.489ct Loose Sale price¥9,800

Bicolor tourmaline 9.199ct loose stone Sale price¥9,800

Bicolor tourmaline 3.468ct loose stone Sale price¥6,980

Bicolor tourmaline 7.532ct loose stone Sale price¥9,800

Bicolor tourmaline 7.809ct loose stone Sale price¥9,800

Tanzania Bicolor Zoisite 1.509ct Loose Stone Sale price¥22,800

Tanzania Zoisite 1.000ct Loose Stone Sale price¥19,800

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.

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