. . . at least not as a collectible.  Religious items have gone from being dead inventory to hot items among antiques collectors. 

As this story indicates, certain items--alms boxes, altar ornaments--are harder to find because, well, to get them usually requires someone to first steal them from a church, mosque or synagogue.  This makes antique religious jewelry particularly attractive for people who want to acquire collectible religious collectables without fueling the market for theft.