Italian to English Art/Literary Art, Arts & Crafts, Painting

Taken from an interview with an artist:

"Successivamente, mi dedico alla decorazione della tela utilizzando malte vetrate o perlate, pietre Swaroski, paillettes, perline, polveri glitterate o, in certi casi, rose stabilizzate."

Any ideas? Is 'mortar' the best term to use here?

Here is an example of one of the works decorated with 'malta vetrata': http://www.lucreziagiarratana.com/portfolio-item/bacio-klimt...
Many thanks!