Borsonia silicea is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

(Original description) Shell.—The high, narrow shell has a biconical shape with a tall, blunt, scalar spire, and a short contracted base.

The apex consists of two glossy, tumid, rounded whorls of nearly equal size, and with a very slight suture.

The aperture is small, narrow, pear-shaped, angulated above, and drawn out into a short open siphonal canal in front.

The inner lip has a thinnish glaze on the body and columella, whose union is very slightly concave.