This document discusses different types of pearls used in jewelry making. It describes the basic properties of pearls, noting they are composed of calcium carbonate layers formed within mollusk tissue. Several pearl types are outlined, including Akoya pearls from Japan/China known for their round shape and luster, as well as Freshwater, Tahitian, and South Sea pearls which differ in origin, coloration, size and rarity. The document recommends learning to make pearl necklaces as they are classic, versatile accessories that look good on all ages and complement many outfits.