Arrangements of blank" >shells, minerals, target="_blank" >glossary/mother-of-pearl-2/" class="glossaryLink" data-cmtooltip="5181183e7b0f74d7b228b5a8748f4666" target="_blank" >mother-of-pearl, etc. in patterns (called coquillageor marine ornament) for decorations of walls of grottoes, nypmhaea, etc…