Includes 20 inch silver chain; to request 18 or 24 inches simply leave a note during check out. Pendant is approx 2.5 inches. This is the exact piece you will receive. Wrapped in Silver coated wire. Purple Agate is a stone composed of microscopic quartz crystals that have positioned themselves in beautiful layers of white and purple. Purple Agate is known to stabilize and protect the aura by getting rid of negative energy. It  even wards off negative vibes before they enter your space.