Sterling silver religious jewelry is the broadest themed jewelry in existence. Inside religious jewelry there is specific types of jewelry that fit into religious jewelry like Christian jewelry, cross jewelry, cross necklaces, Jewish jewelry, Buddha jewelry, Hindu jewelry and Celtic jewelry.
Technically Christian jewelry is is sometimes a more popular genre but it is limited to only Christian related jewelry. Outside of a Christian country, religious jewelry may be more popular where non Christians reside in great numbers. But here in America Christian jewelry is more popular and more of a narrow focus.