Went to the store today to get Moldavite and the p...

Went to the store today to get Moldavite and the price range is from $70-$520 so I asked the clerk why is this so expensive comparing to all the other stores in the city or even online. I asked the price per gram and they had no idea meanwhile every other store is charging $10-$12 a gram for Moldavite tbh this store is a rip off. Please check prices with other stores before you buy here.