PSA: commonly-sourced scallops will be filled with sand and be very gross and annoying with every, gritty, tooth-grinding, crunchy bite. Found this out the hard way by wasting a $65 bag from Costco because every scallop had sand with every bite. It was so gross and disappointing and infuriating.
Discussion
So when you buy scallops you should always rinse them and then dry them before searing.