Left: Precambrian granite, primarily biotite, orthoclase, and quartz. Tijeras Canyon, New Mexico.

Right: Asphalt pavement with crushed granite aggregate. Tijeras Canyon, New Mexico.

I located one of the barrow pits (quarry) used for Route 66 pavement east of Albuquerque; the granite sample is from this pit.

The granite aside the pavement fragment look like black and white photo negatives of each other, in color and grain size/angularity. Way cool.