Brittle

Brit"tle (?), a. [OE. britel, brutel, AS. bryttian to dispense, fr. breótan to break; akin to Icel. brytja, Sw. bryta, Dan. bryde. Cf. Brickle.] Easily broken; apt to break; fragile; not tough or tenacious.

Farewell, thou pretty, brittle piece
Of fine-cut crystal.
Cotton.

Brittle silver ore, the mineral stephanite.