These chains are woven by (my) hand using a metal tube (to ensure the loops are uniform in size). The pearls are predrilled as beads and inserted on the chain as it is woven so they are totally secure. There are many colors of small pearls available so I can produce many combinations of pearls and wire. The chains that have end hooks come with a 2" piece of chain so the pearl chain can be worn at adjustable lengths with the hooks in the back. The 18k and 14k chains are expensive because of the cost of gold and the fact that the adjustable chains are handmade (by me) and are not commercially available. These chains are fairly heavy and are amazing to wear for that special occasion (including bridal events).