family jewels

NOUN
13 LETTERS · STARTS WITH F

family jewels is a valid 13-letter word worth 30 points in Scrabble and 34 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
F4A1M3I1L1Y4J8E1W4E1L1S1
4 + 1 + 3 + 1 + 1 + 4 + 0 + 8 + 1 + 4 + 1 + 1 + 1 =30 PTS
DOUBLE WORD → 60TRIPLE WORD → 90
MEANING

What does family jewels mean?