Thimbles. 
These are small thimble-like parts: No idea what they were used for but it's probably aerospace related since there are few other applications of beryllium. 
Source: eBay seller allthedodaday 
Contributor: Theodore Gray 
Acquired: 2 November, 2004 
Price: $38 
Size: 0.5" 
Purity: 99%
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