SPINEL

REFRACTIVE INDEX     1.712 - 1.717, normal. Reds may go up to 1.735 and blues to 1.747.
HARDNESS        7.5  -  8
SPECIFIC GRAVITY       3.58  -  3.61

MINERAL  CLASS        Spinel

 

Spinel was usually associated with Rubies, due to the fact that large red Spinel were found in the same mines that Rubies were mined at.  Since they had the same characteristics and practically looked the same to the naked eye, they were often believed to be Rubies.

 

Spinel is a favourite of gem dealers and collectors on account of its brilliance, hardness and wide range of spectacular colours.

The most highly valued spinels are the reds with purplish red (ruby spinels) and orangey red colors (known as flame spinels), commanding the premium prices. Top quality red spinels are actually rarer than top quality rubies, although they are not as expensive. Burmese Spinels in fine stones always adds value.

 

As with all stones, values are highest for rich, saturated colors in clean stones and large sizes. Pink spinels in hues from bubblegum color to hot pinks are sought after. The blues and violets, unless the color is highly saturated are, in general, more modestly priced. Among the blue stones, those colored by cobalt are especially valued for their pure, rich color. Star stones and color change varieties are rare in this species and highly valued.

 

The most rare and valuable amongst Spinel gemstones are the Red Spinels, followed by the Cobalt Blue Spinels

 

Found mainly in Burma (Myanmar) and Sri Lanka,  but more recently from various sites in Vietnam, Africa, Russia, and Australia.