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Opal Pendant. 925 Pendant
 
 
This pendant has 925 stamped on the back. 
 
They are in good vintage condition. See photos for particulars. 
 
It measures 3.7cm x 1.1cm.
 
The 'chain' hanging section has a very small diameter of 0.2cm or less.
 
The opal is just a slice, not an entire stone.
 
Note - the colour in opal is dependent on light hitting it at angles.