Fossil and Petrology collections, New South Wales containing diamond. Many samples in the recent part of the Petrology collection are either irreplaceable or extremely expensive to replace, such as the samples from the Snowy Mountain tunnels or the samples from drill holes. Hand written catalogues from the older parts of the collection are no longer used much because the information has been captured into the ROCKS database. However the old and newer parts of the collection are stored together and are frequently accessed on a day to day basis. There is a potential heritage value for parts of the Petrology Collections and Catalogues. The historical Catalogues could
What Is and What Should Never Be descending riff [of "What Is and What Should Never Be"] is amazing: It's like a bow is being drawn back, and then it releases. The rhythm of the vocals is almost like a rap. It's insane — one of their most psychedelic songs." This was also one of the first songs recorded by the band for which Robert Plant received writing credit. According to rock journalist Stephen Davis, the author of the Led Zeppelin biography "Hammer of the Gods: The Led Zeppelin Saga", the lyrics for this song reflect a romance Plant had with his wife's younger sister. "What Is