SEPTEMBER 2026
In September, we always welcome a new Spring, which amongst other things, brings with it colourful plants and blue skies. So we start off this month with an article on “Which are the most Poisonous Minerals?” by Peter Rosewarne. (These are often some of the most brightly coloured mineral specimens.) This is followed by Jo’s home-made Mineralogical Colour Wheel; then we have Peter’s Practical Guide to Identifying Mineral Specimens which we hope will be of interest to our newer members, and finally to keep us grounded is Rosey’s Scale of Heaviness. This month’s Curiosity are the Pedras Parideiras, or “Birthing Stones” of Northern Portugal.