framework a structure supporting or containing something
chassis the skeleton of a motor vehicle consisting of a steel frame supported on springs that holds the body and motor
collet a band or collar that holds an individual stone in a jewelry setting
matting,
mat a covering of coarse fabric (usually of straw or hemp)
mount,
setting a mounting consisting of a piece of metal (as in a ring or other jewelry) that holds a gem in place; "the diamond was in a plain gold mount"
mounting -
an event that involves rising to a higher point (as in altitude or temperature or intensity etc.)
