Clarity : Clean to the eye. Small inclusions visible under a magnifying glass.
Hardness : 3.5-4. Very soft stone
Treatment : None
Origin : Spain
Comment : Stone much more beautiful in real life. The photos do not reflect the fires which are very strong on this stone. The dispersion of sphalerite is greater than that of diamond.
To give you an idea of the size of the stone, the box in the photo is 3x3cm.
Due to its low hardness and perfect cleavage (very hard stone to cut and polish), sphalerite is almost exclusively a collector's gem.
