Item Tag Silk/Silk Blend?

Vintage 1980's Francoise Grenon 2 Piece Skirt Suit Set No Fabric content tags but feels like it is likely silk or a silk blend, taffeta possibly? No size tags - measures as a Medium/Large Blazer has a Rhinestone Button Front, Lined, Shoulder Pads, Floral Embroidered Design Blazer measures approx: 16" shoulder to shoulder, 20" armpit to armpit, 27" shoulder to hem. 16.5" across the waist Skirt has a back zipper and clasp closure and is fully lined. Skirt measures approx: 15" across the waist, 22" across the hips, 29.5" top to bottom In very good condition - no rips, stains, holes or tears.