Pearl - Wikipedia Whether wild or cultured, gem-quality pearls are almost always nacreous and iridescent, like the interior of the shell that produces them However, almost all species of shelled mollusks are capable of producing pearls (technically "calcareous concretions") of lesser shine or less spherical shape
What Are the Different Types of Pearls? A Complete Guide There are various types of pearls From saltwater pearls to freshwater pearls, there’s a pearl type for everyone’s taste and budget But what’s the difference between the types, and how can you choose which is right for you?
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How Much Are My Pearls Worth? A Realistic Value Guide How Much Are My Pearls Worth? A Realistic Value Guide Did you inherit a pearl necklace? Learn how to determine if your pearls are real, identifying the type, and estimating their true resale value