$10000/ton is $5/lb from a quick google search they are about $250/lb for industrial diamonds. So 50* 50 or 2500 billion or 2.5 trillion with no idea if they can use run of the mill industrial diamonds or if there will be additional processing to get them into the aerosolized form also how are you going to launch them, and for how many years would we need to do it
One of the Republican talking points was that Kamala never won a primary and just snuck in. Not that it mattered for her actual policies but more so it was another reason for votor apathy