Comment by Broken_Hippo

In college, I worked as a lab assistant for a professor studying them. I spent a lot of time counting microscopic young, scraping adults off of traps, measuring and weighing them before cracking them open to scoop out their insides and weighing them.

These little fellows are, in general, small. I guess they can get 50mm (2in), but most aren't that large and they have thin shells.

Further, I'd be somewhat afraid that creating products from them would spread the invasive species even further. The professor I worked for studied them because of their invasiveness - the lakes he set traps on were obviously spread by people. They spread easily by the water in boats - microscopic young means people don't know they spread them.