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cobalt spinel

Spinel is one of the birthstones for August. Among spinels, those that contain a large amount of cobalt and exhibit a bright blue color are called cobalt spinels. The shade of blue is thought to change depending on the cobalt content, and the darker the blue, the more valuable it is.

Karatz GemMagazine
" Cobalt Spinel "

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Cobalt Garnite 0.122ct loose Sale price¥18,800

Cobalt Garnite 2.909ct loose Sale price¥19,800

Cobalt Garnite 0.251ct loose Sale price¥29,800

Cobalt Garnite 0.145ct loose Sale price¥25,800

Sold out ベトナム産コバルトスピネル原石 1石
Sold out ベトナム産コバルトスピネル1石ルース
Sold out [Mr. Sanjay] Cobalt Garnite 1 stone loose (with translation, 2.0-2.3mm)《Multiple purchase discount available》
Sold out Tanzanian cobalt spinel 1 stone loose (1.3-1.4mm round cut) {Multiple purchase discount available}
Sold out コバルトガーナイト 0.400ct原石 - KARATZ STORE|カラッツSTORE
Sold out コバルトスピネル 0.320ctルース - KARATZ STORE|カラッツSTORE
Sold out 【12522461掲載】コバルトスピネル 0.213ct原石
Sold out 【12522462掲載】コバルトスピネル 0.225ct原石
Sold out Cobalt spinel 0.320ct rough stone from Vietnam
Sold out コバルトガ―ナイト 0.060ctルース - KARATZ STORE|カラッツSTORE
Sold out コバルトガーナイト 1.270ct原石・ルースセット - KARATZ STORE|カラッツSTORE
Sold out コバルトスピネル 0.701ctルース

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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.

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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.