My periodic table poster is now available! Aladdin lantern mantle. This is another style of antique lantern mantle, probably from the 60's or so, when they were still using thorium oxide. Source: eBay seller paul-n-jayne Contributor: Theodore Gray Acquired: 11 March, 2007 Text Updated: 12 March, 2007 Price: $10 Size: 3" Purity: <20%