One ounce bullion bar. 
I purchased several small bars of gold for spurious reasons in the early 1990s from a coin dealer near Berkeley, California.  They added up to one ounce total.  In April 2002 I traded them for a single one ounce bar at Specialty Stamp and Coin in Champaign, Illinois (for $25).  I then had a 14K gold loop welded to the back of it by Brian Knox jewelers, Champaign, Illinois, so it could be locked down to the table with a length of stainless steel cable. 
Pure gold is incredibly soft!  It keeps getting bent, but I think if I put a label on it saying "please don't bend the gold" it would only make the problem worse. 
Source: Coin Shop in California 
Contributor: Theodore Gray 
Acquired: 15 April, 2002 
Price: $400/including loop 
Size: 1.5" 
Purity: 99.99%
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