6 letters, score 24: Composed of silicon dioxide, it's the most abundant mineral on Earth's surface

2010 saw the 40th anniversary of this pro-environment observance 3 of the 4 Star Wars movie characters with Darth in their names,(3 of) Darth Maul, Darth Vader, Darth Sidious 3 Rays have won Olympic gold medals in boxing for the U.S.: Ray Mercer, Ray Seales & this sweet guy 4 English Channel lighthouses have been built on the Eddystone Rocks, famed cause of these disasters 9th Century Viking invaders set up the Danelaw, an area in this country in which Danish law was supreme A believer in Gandhi's nonviolence philosophy, A.J. Muste helped found C.O.R.E., this group A bishop would know this term for a corner where the seams form a 45-degree angle A bloody Loyalist tale