GIA Certified Thai No Heat Cushion-Cut Ruby and Diamond Cocktail Ring earrings What does the "EM" signature

What does the "EM" signature signify on this suite

41 carats total

Designed in a continuous tennis style

Maker / Signature: Signed EM for Meister (Zurich

GIA Certified Thai No Heat Cushion-Cut Ruby and Diamond Cocktail Ring earrings What does the "EM" signatureGIA certified Thai no heat cushion brilliant cut ruby and diamond vintage cocktail ring, crafted in 14 karat yellow gold. Featuring a GIA certified Thai no heat cushion brilliant cut ruby weighing 1. 27 carats. The vibrant red ruby measures 6. 35 x 6. 10 x 3. 25mm and displays exceptional brilliance and saturation, a hallmark of fine unheated Thai rubies. Surrounding the central ruby are four sparkling round brilliant diamonds, estimated at 0. 50