"I still can't believe my 1 year anniversary gift. 17 carat emerald cut. Wow. I love my hubby," she captioned the photograph.
Avril is preparing to kick off her Zepp tour in Japan in a fortnight. Time apart is a regular occurrence for the couple because of their respective music careers, but this has proved no obstacle to maintaining a happy marriage.
The Canadian couple , whose wedding was covered exclusively by HELLO!, have rules they both abide by to keep their romance on track.
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Avril Lavigne and Chad Kroeger have been married for a year
"We don't go more than two weeks without seeing each other," Avril told People magazine. Her 39-year-old partner added: "And we don't drink when we're apart."
The couple said that putting themselves in a position of temptation was something they were not willing to do as they value their union too much.
"We don't want to go anywhere that you're asking for trouble," Chad added. "This is something that we want to cherish and protect."
Avril, who was married to Sum 41 rocker Deryck Whibley from 2006-2010 said: "When you've got something special, you can't be careless with it."