keyword: Pearls – 4 free books.
Goods and Services of Marine Bivalves
Aad C. Smaal et al. (editors)
Mineralogy and Geochemistry of Gems
Panagiotis Voudouris et al.
Pearls & Parasites
A. E. (Arthur Everett) Shipley, Sir
The Book of the Pearl The history, art, science, and industry of the queen of gems
George Frederick Kunz and Charles Hugh Stevenson