Afternoon All. I was wondering if anyone might have come across a rock like the one in the attached images? The only information I have is a scrap of paper with it saying North Skye. Can anyone identify it or narrow down the location please. It doesn't effervesce in HCl, so it's not a carbonate. I am assuming some form of Silicified bivalve shell deposit. Any comments appreciated. Thanks Simon * Simon Howard Curator of Petrology, Earth Systems Department of Natural Sciences National Museums Collection Centre National Museums Scotland 242 West Granton Road Edinburgh EH5 1JA * 0131 247 4489 email: [log in to unmask]<mailto:[log in to unmask]> web: www.nms.ac.uk/collectioncentre<http://www.nms.ac.uk/collectioncentre> fax: 01315514106 Coming soon: See intricate miniature paintings and beautifully crafted jewellery once owned by Maharaja Duleep Singh. Indian Encounters, 14 November 2014 - 1 March 2015, www.nms.ac.uk/indianencounters National Museums Scotland, Scottish Charity, No. SC 011130 This communication is intended for the addressee(s) only. If you are not the addressee please inform the sender and delete the email from your system. The statements and opinions expressed in this message are those of the author and do not necessarily reflect those of National Museums Scotland. This message is subject to the Data Protection Act 1998 and Freedom of Information (Scotland) Act 2002. No liability is accepted for any harm that may be caused to your systems or data by this message.