Iridium Phonograph needle
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Phonograph needle.
Osmium phonograph needles are fairly common, but this is the first iridium one I've seen. Hard metals were used for needles like this so they would last a long time playing abrasive records.
Source: eBay seller harrymarks
Contributor: Theodore Gray
Acquired: 29 September, 2003
Price: $5
Size: 0.5"
Purity: <50%
Iridium