The trombone is a musical instrument in the brass family. Like all brass instruments, sound is produced when the playerâs vibrating lips (embouchure) cause the air column inside the instrument to vibrate.
cameo noun [ C ] (PERFORMANCE) âº a small but noticeable part in a film or play, performed by a famous actor: He appears briefly towards the end of the film in a cameo role as a priest. âº a piece of usually oval jewellery on which there is a head or other shape of one colour on a surface of a different colour: a cameo brooch.
If you cannot see through the cameo at all, chances are the cameo is not shell. If you see any fine cracks or crazing while inspecting the back or front of the cameo up against the light, this is an indicator that your cameo is made of shell. Next look at your shell cameo under a 10x loupe from the front.