Known as a "Penny ring",
because of it's small size. Diam 17mm, small size N.
Turquoise was thought to
protect the wearer against poisoning, drowning, or having an accident while
riding. It was also supposed to have the property of indicating the state of
health of the wearer, a quality later enshrined in Donne's couplet-
'As a compassionate Turcoyse which doth tell
By looking pale, the wearer is not well.'