Storing - Does packing into rocks make a difference in size?

[brownie322]

SWIM is aware that the size of 8balls have already been discussed, but SWIM wanted to know if she had been conned. When SWIM bought what her dealer claimed to be an 8ball, it was a compacted rock that filled up no more of a plastic corner than a gram of regular crushed coke did. He reasoned that the consistancy and specific type of product is the reason for it's seemingly small size, and that once crushed, would break away into a large amount of powder. Is this even possible? Does packing seriously make a difference? If SWIM was indeed misled, what should she say to confront him?