My periodic table poster is now available! Slab. Rough sawn slab, dropped during photography effort, thus revealing pretty internal fracture surfaces. Sometimes dropping and breaking a sample is a good thing. Source: eBay seller swordsandstones Contributor: Theodore Gray Acquired: 1 August, 2006 Text Updated: 21 January, 2007 Price: $10 Size: 4" Purity: 99.9999%