Gemstones from ring found by friends (5)
I believe the answer is:
opals
'gemstones' is the definition.
(opal is a kind of gemstone)
'ring found by friends' is the wordplay.
'ring' becomes 'o' (letter resembling a ring).
'found by' says to put letters next to each other.
'friends' becomes 'pals' (pal is a kind of friend).
'o'+'pals'='OPALS'
'from' is the link.
(Other definitions for opals that I've seen before include "jewellery" , "Milky white and coloured gems" , "Milky sparkling gemstones" , "jewels" , "Milky-white stones" .)