Noah Webster's Dictionary (n.) The quality or state of being precious; costliness; dearness.

Multi-Version Concordance Preciousness (2 Occurrences) 1 Peter 2:7 For you therefore that believe is the preciousness: but for such as disbelieve, The stone which the builders rejected, The same was made the head of the corner; (ASV DBY YLT) Psalms 37:20 But the wicked perish, and the enemies of Jehovah, As the preciousness of lambs, Have been consumed, In smoke they have been consumed. (YLT)