I have ordered crystal tags in the past, and the crystals always fall off! I put these on the dogs almost 2 months ago and despite their roughhousing and being generally high energy dogs, no stones have been lost.
These seem to be laser printed? Not laser cut. I was expecting that exposed metal where the writing was, but its completely smooth and seems like it was printed on. That is fine, as long as it doesn't scratch out or fade away.