The past few weeks at the Tucson Fossil I ran across a few fake Spinosaur claws but also was surprised how many good ones there were on the market.  I also understand the issues with online claws so decided to put this topic out to help collectors gain a better understanding of them since they are very expensive.  These are my opinions and welcome others since no one person as all the answers.   There is no bullet proof approach you can take to insure you have a claw that is not totall