The image is a watercolor painting of a large, roughly rectangular rock with colorful veins running through it. The rock itself is a muted blue-gray color, with an irregular, jagged outline. Several veins cut across the rock, each a different color. There's a prominent dark blue vein that runs diagonally across the center, and a thinner, parallel vein of the same color. A yellow vein also runs diagonally, intersecting the blue veins. A thin, reddish-pink vein runs horizontally across the lower portion of the rock. The painting is on a slightly aged, off-white paper. Below the rock, in dark, blocky lettering, is the text "GRANITE VEINS in a Bowlder.". Below that, in smaller lettering, is "21. W.- Hampton, Mass.". The edges of the image are slightly darkened, suggesting the age of the paper or the way the image was preserved.