What is a journey necklace?

I happen to see online at a jewerly site that the journey necklace represented "good times, bad times and your journey together"

They Journey necklace is a pendant style resembling a meandering " S " shape. The stones are set as follows.The smallest one at the bottom represents the beginning of your journey together, and each ascending stone is slightly larger, as it represents the growth of your love and comittment to each other. I would recommend this as a 5th Anniversary gift as that has a better visual effect than three stones, but of course , it's a matter of personal choice.