Many casual readers confuse statements such as
"which *may* have had symbolic or ritual significance."
Attribution of potential cause of inferred behaviour to "ritual" is a long standing practice in archaeology; it's code for "we don't know" and covers all manner of things that may simply have developed as habit over years, may have unknown and non supernatural causes / motivations, etc.
Besides, that green quartz crystal is beautiful. If you can only afford to carry a limited number of objects then I personally would try to find a way to turn it into an object I can hold, use, and admire every day.