You've got the Key To My heart!
This enduring motto is styled here with an oval dendritic agate set in a pinched collet setting, and hanging from it a gold key one side, a gold padlock the other, and in the centre a ruby heart!
Hanging from the micro chain below is a magical cats eye chrysoberyl.
 
This was originally a brooch but I have found some more georgian micro chain to echo the chain below and made it into a pendant!
 
English circa 1810
15 carat gold 
weight - 2.4g
hanging 43mm long and is 25mm wide
In excellent condition