By Colour
Cobalt Blue Spinel
Cobalt-blue spinel is one of the rarest and most sought-after gems in the world — an electric, vivid blue coloured by trace cobalt, most famously from Luc Yen in Vietnam. In top saturation it is rarer than fine blue sapphire and commands the highest prices in spinel.
Because lab-grown cobalt spinel exists, provenance matters: every cobalt-blue spinel we offer is natural, untreated and independently certified. We select for pure, saturated blue and bright, lively cutting.
Vivid, rare & natural — independently certified, never lab-grown.
Questions
Cobalt Blue Spinel — Frequently Asked
- Why is cobalt-blue spinel so expensive?
- Its intense, cobalt-driven blue is extremely rare in nature, particularly in larger, saturated stones. Fine cobalt spinel is rarer than comparable blue sapphire and demand from collectors is strong, so top material commands premium prices per carat.
- Is cobalt-blue spinel natural or lab-created?
- Both exist, which is why certification is essential. We deal only in natural, untreated cobalt-blue spinel, and every stone is accompanied by an independent gemological report confirming it.
- Where does cobalt-blue spinel come from?
- The most celebrated cobalt-blue spinel comes from Luc Yen, Vietnam, with notable material also from Sri Lanka and Tanzania. Origin can influence value and is documented on the certificate where determined.
- What should I look for in a cobalt-blue spinel?
- Look for a vivid, pure blue with strong saturation (not greyish or inky), bright cutting, good clarity, and a certificate confirming natural, untreated spinel.
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Sources
Facts on this page draw on independent gemmological authorities:
- Gemological Institute of America (GIA) · Institute
- Gübelin Gem Lab · Laboratory
- GRS (GemResearch Swisslab) · Laboratory
- Lotus Gemology · Laboratory