a diamond in the rough

someone or something whose good qualities are hidden This film is one of those diamonds in the rough, a wonderful gem that almost no one has noticed.

Etymology: based on the idea that you cannot see the beauty of a diamond (jewel) when it is rough (not yet cut and filled with brightness)

Name	Pronounced	Usage
Aureole	AWR-ee-ol	English (Rare)
Mcdonald	[mək'dɔnəld]
Neemias	-	Biblical Latin, Biblical Greek
Fotis	-	Greek
Zephyros	-	Greek Mythology, Ancient Greek
Theodosius	-	Ancient Greek (Latinized)