41. The combination of aragonite and conchiolin is called nacre , which makes up mother-of-pearl. 42. Over the years, the irritating object is covered with enough layers of nacre to become a pearl. 43. In 2012, researchers created calcium-based nacre in the laboratory by mimicking its natural growth process. 44. The planet Nacre 's dominant species are fungi, including the intelligent " mantas ". 45. The nacre is almost smooth, but shows traces of spiral sulci, and is very minutely wrinkled. 46. Light wave interference from its plate-like structure gives a pearly iridescent light reflectivity similar to nacre . 47. She said that group included Nacre Corp ., Risk Capital Holdings, Capital Re Holdings and IPC Holdings. 48. Instruments covered with celluloid can easily be recognized by the material's typical nacre -like flaming pattern. 49. The interlocking of bricks of nacre has large impact on both the deformation mechanism as well as its toughness. 50. Nacre sheets may be used on interior floors, exterior and interior walls, countertops, doors and ceilings.
