Freshwater pearls and saltwater pearls have different characteristics and price ranges. While saltwater pearls – such as Akoya, Tahitian and South Sea – are typically more expensive due to their rarity and luster, freshwater pearls have become increasingly popular for their affordability and a wide range of colors and shapes. South Sea pearls tend to have a larger, more organic shape, while freshwater pearls are smaller, rounder and more uniform. Both types make beautiful choices for women's pearl necklaces. It all comes down to personal preference and budget.