My periodic table poster is now available! The Hammer Radium Spinthariscope. I'm not sure what "The Hammer" means, but this is a fairly nice little radium spinthariscope. Spinthariscopes are explained in more detail here. Source: eBay seller watsgotslots Contributor: Theodore Gray Acquired: 19 May, 2007 Text Updated: 19 May, 2007 Price: $86 Size: 1.25" Purity: <1% Sample Group: Spinthariscopes