VOVOV16 Pack 20" Hanging Crystals for Chandeliers Clear Teardrop Crystal Chandelier Pendants Parts Beads, Chandelier Crystals

Do chain links rust outdoors?

Do they come as 16 indivdual strands or do i have to attach each crystal together to make strands?

Are these glass or plastic? Some reviews say glass, others plastic, and one says it fell 7' onto tile and did not break (indicating plastic).

How does one wash these crystals?