You are looking at a beautiful 18k white gold and natural Colombian emerald ring.  
 
The baguette cut emerald is about 0.4 ct in weight. It is a lovely emerald with a few natural inclusions that are common in real emeralds.

The ring is in excellent condition, weighs 3.2 grams and is a size 6.  It can easily be re-sized by your local jeweler.  
 
A gorgeous hand made piece that would retail for more than $900! 

Makes for an amazing anniversary or engagement ring!