Purfling

v. decorate the edge or border of clothing or furniture; embroider

Purfling is a narrow decorative wooden (sometimes abalone) strip inlaid into the top and (often) bottom plates of stringed instruments. Usually purfling is a sandwich of two black strips with one white strip in the middle, measuring about .050"W x .080"D (1.25 mm x 2.00 mm), but other variations are sometimes used. The earliest known example of purfling is on a violin made by Andrea Amati in 1564, now on display in the Ashmolean Museum at Oxford University. It consists of two outer strips of pearwood stained black and an inner strip of poplar.
See more at Wikipedia.org...

(n.)
Ornamentation on the border of a thing; specifically, the inlaid border of a musical instrument, as a violin.
  

LISTELLO ORNAMENTALE