colored stone loose

A list of colored stones and loose gemstones.

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Burmese pigeon blood ruby 1.340ct loose GRS

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Pink imperial topaz 3.662ct loose medium treasure appraisal

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【12523528掲載】ビルマ産非加熱カラーチェンジサファイア 5.580ctルース

Unheated color change sapphire from Burma 5.580ct loose with GIA

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Alexandrite Cat's Eye 0.831ct Loose DGL Appraisal

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Paraiba tourmaline from Mozambique 1.513ct loose medium treasure appraisal

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Particolor tourmaline 19.191ct loose (bicolor tourmaline)

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Dumortierite in quartz 4.994ct loose

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Tourmaline cat's eye 1.090ct loose

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Colombian Euclase 0.970ct loose

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Colombian Euclase 4.40ct loose

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Paraiba tourmaline from Brazil 0.11ct loose with GIA

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Oil-free emerald 0.20ct loose GIA

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Paraiba tourmaline from Brazil 0.138ct loose

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Paraiba tourmaline from Brazil 0.093ct loose

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【KEN氏】非加熱グリーンサファイア 0.470ctルース GIA付（ミントカラー） - カラッツSTORE

Unheated Green Sapphire 0.470ct Loose GIA Certified (Mint Color)

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[Sakura in-cut] Ametrine 2.150ct loose

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[Konpeito] Aquamarine 3.813ct loose

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[Konpeito] Milky quartz 4.034ct loose

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[Konpeito] White quartz 3.539ct loose

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[Konpeito] Chalcedony 2.760ct loose

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[Konpeito] Sea blue chalcedony 2.606ct loose

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[Koshu Precious Stone Kiriko] Opal 1.830ct loose with Sakura Kiriko emblem

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【甲州貴石切子】レピドクロサイトインクォーツ 9.250ctルース（通称名：スーパーセブン） - カラッツSTORE

[Koshu precious stone cut glass] Lepidocrocite in quartz 9.250ct loose (common name: Super Seven)

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Orange Benitoite 0.132ct loose (bicolor)

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Benitoite 0.689ct loose《Mr. Yukio Shimizu, representative of Shimizu Precious Stones》 Patch included

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【12522995掲載】ロシア産デマントイドガーネット（ホーステール認む） 0.610ctルース

Russian demantoid garnet (horsetail recognized) 0.610ct loose

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Indigolite tourmaline 2.975ct loose DGL appraisal (blue tourmaline)

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Dendritic Agate 12.080ct loose

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Particolor tourmaline 40.970ct loose (4 colors)

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Iolite rough stone/loose 2 stone set《Multiple purchase discount available》

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Unheated pigeon blood ruby 0.560ct loose with AIGS

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【11521941掲載】スリランカ産ロイヤルブルーサファイア 0.360ctルース

Royal blue sapphire from Sri Lanka 0.360ct loose with AIGS

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【11521940掲載】スリランカ産ロイヤルブルーサファイア 0.860ctルース

Royal blue sapphire from Sri Lanka 0.860ct loose with AIGS

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Burmese unheated star ruby 1.55ct loose with GIA

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Blue green tourmaline 7.79ct loose

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【12521754掲載】ロシア産デマントイドガーネット（ホーステール認む） 0.66ctルース

Russian demantoid garnet (horsetail recognized) 0.66ct loose

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【ダンデライオンカット】アルマンディンガーネット 1.60ctルース - カラッツSTORE

[Dandelion cut] Almandine garnet 1.60ct loose

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Morganite raw stone + 2 loose pieces (orange/pink, approx. 6 x 4 mm) 3-piece set《Multiple purchase discount available》

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【さくらインカット】オレゴンサンストーン 1.55ctルース - カラッツSTORE

[Sakura Incut] Oregon Sunstone 1.55ct Loose

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Brazilian Paraiba tourmaline 0.164ct loose pear (half moon cut)

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[Koshu Precious Stone Kiriko] Oregon Sunstone 4.60ct Loose

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.