Mesh. This is a very unusual and very expensive form of platinum: Fine ultra-pure woven platinum cloth. (Like mosquito netting only more expensive.) .Greg sells this stuff and he very kindly donated a sample: This is way, way more expensive than I could possibly afford for an element sample (about $1100 a gram). He also sells lots of other unusual elements on eBay: Check the source link for more information. Source: Greg P Contributor: Greg P Acquired: 18 April, 2003 Price: Donated Size: 1" Purity: 99.99%