Glassiness

In one spot, the gush of the water violently agitated the sand, but without obscuring the fountain, or breaking the glassiness of its surface.

The luster of inquiring glance faded swiftly into vacant glassiness.

The rounded top rail had been polished to glassiness by the Sunday trouser-seats of generations of village youths whose favourite perch it had been while waiting for the chimes to stop [...]