Graphite is black and opaque, whilst diamond is colourless and transparent; it is one of the softest (H= I) of minerals, and diamond the hardest of all; it is a good conductor of electricity, whilst diamond is a bad conductor.
Deidre managed to pull them on and then went back to the wardrobe, selecting the softest sweater and a pair of jeans.
Xander barely resisted the urge to touch the finely woven garment with a fur lining that was certain to be the softest thing in the world.
She invented a deity of her own, a mysterious Corambe, half pagan and half Christian, and like Goethe erected to him a rustic altar of the greenest grass, the softest moss and the brightest pebbles.
In the interest of euphony some harmonious sound is needed to bridge the great gap which almost always exists between the bass and the upper instruments, but this filling out must be of the softest and most atmospheric kind.