(Borrowing from the National Register of Historic Places)
How about, collectible beads are beads:
A. That are associated with cultural periods or expressions that are significant to the broad patterns of history; or
B. That embody the distinctive characteristics of a type, period, or method of construction, or that represent the work of a master of group of masters, or that possess high artistic values; or
C. That have yielded or may be likely to yield, information important in history or prehistory.