It's the earliest official collection of mineral samples in the world and fills this huge space. (frieze.com)
To test his theory, he let mineral samples soak up the sun and then wrapped them in black cloth with a photographic plate, expecting the resulting X-rays to create weak images. (discovermagazine.com)
Some prospectors scour old mines for mineral samples and the society is now recommending that its members wear breathing apparatus. (newscientist.com)