Definition of peristerescence
A broad, diffuse white or bluish schiller or interference effect, seen in certain directions in some translucent sodic plagioclase (albite-oligoclase) as it is turned around. It is caused by diffused reflections of light from parallel intergrowths or exsolutions of K-feldspar, known as peristerite. Peristerite is sometimes used as a semi-precious gemstone, sometimes known as moonstone.
Ref: CMD
Ref: Webster 3rd
Variety of: schiller
Ref: CMD
Ref: Webster 3rd
Variety of: schiller