sardonics / sardonyx [sarˈdɒnɪks]
sardonics – n. – 1. convulsive laughter expressing derision; 2. skeptical humour
sardonyx – n. – 1. a variety of onyx or stratified chalcedony having white layers alternating with one or more strata of a semi-transparent quartz, of a deep dull red, flesh, or reddish white colour with multiple applications