A perfect choice for yourself, or as a gift, our Tanzanite stud earrings feature sturdy cast basket settings and beautiful sparkling gems. A pair of tanzanite earrings makes for an unforgettable gift. A rare and precious gem, tanzanite is sure to please. White topaz is a popular substitute for the birthstone of April, which is diamond. A pair of white topaz earrings is an affordable alternative to expensive diamond studs.