Guide Friðrik was a frequent visitor in Petra´s rock collection. He maintains that Petra is one of the cornerstones of the nation:
"Petra was sincere and remained faithful to her ideals. This enabled her to enthrall the general public. Because of this the collection is indeed on an international scale. Most tourist in Iceland are "ordinary people" who are capable of taking in what is ordinary and appreciate an initiative such as the rock collection. Public discussion in this country is - alas - on a very base plan, revolving around money and glorifying celebrities – which again overshadows admiration and understanding for enterprising individuals like Petra. If we scrutinized in more detail the good and sincere deeds in our own country, we wouldn´t find ourselves in a spiritual straightjacket. People would learn to appreciate more their country and abolish this perpetual sense of inferiority. Petra is indeed one of the cornerstones of our nation. I am thankful for the opportunity to know her and her work."