Having mag'd the image 400x , still can tell little from it , excepting that perhaps it might open the door to get in a request for another pic on a white paper .
Could be a bunch of treated stones , all of em' look purty small too .
If you're into working with stones , perhaps might be worth having a project pile like that one , or to try to market to the Japanese anime cell-phone deco-bunch , but those stones depicted in the image are nowhere near investment quality , IMO .