crusta

A crust or shell.

A gem engraved, or a plate embossed in low relief, for inlaying a vase or other object.

A cocktail (typically of brandy, orange liqueur, bitters, and lemon juice and peel) distinguished by a sugared crust on the rim of the glass.

Crusta is made the same as a fancy cocktail, with a little lemon juice and a small lump of ice added.