19th century illustration pearl divers. A pearl is a hard object produced within the soft tissue of a living shelled mollusk. Just like the shell of a clam, a pearl is composed of calcium carbonate in minute crystalline form, deposited in concentric layers. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Parker, David |
Taille de l’image : | 4822 px × 7249 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |