Right, to see what is in the packages, click the the green 'offers' button in your notification bar on the right. Then click "open shop", and you can mouseover the different packages to see their contents.
If you don't see the 'offers' button, try refreshing.
Alternatively, click the "+" button like you want to buy diamonds, then the 'Other Payment method' button, then the green offers tab. Then you can mouseover. (If you hit the green offers tab without clicking 'other payment', you can buy the packages but not see what they are.)
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I purchased the Philosopher's Stone and have no clue where to find it. Can anyone help???
The goods should have gone straight to your town hall, I believe. Your FP package should be in your inventory, the bottom left gold button on the game screen.