It did! It found them to be hard, and empty.NASA studies strongly suggest they are just hematite accretions. https://www.intechopen.com/books/mineralogy-significance-and...

These photos are from like sol 965; it’s currently well into the 3,000s. The rover would have to backtrack significantly.

They are a few millimeters wide. Opportunitys arm is probably physically unable to grab them

Because it felt squeamish.