ruby - n.a deep red stone that is used in jewelry : a dark red color

moisture - n. a small amount of a liquid (such as water) that makes something wet or moist

elasticity - n. the quality or state of being elastic

elastic - adj. able to return to an original shape or size after being stretched, squeezed, etc.

tart - adj. having a sharp or sour taste. For example, lemonade without enough sugar is tart.