|ISSUE DATE:||2 January 2017|
|STAMP SIZE:||52 x 40 mm|
|STAMP DESIGN:||Claude Perchat|
The name pyroxene is derived from the Ancient Greek words for fire and stranger. Pyroxenes were so named because of their presence in volcanic lavas, where they are sometimes seen as crystals embedded in volcanic glass; it was assumed they were impurities in the glass, hence the name "fire strangers".
Stamp images thanks to La Poste