28 A TREATISE O.N
leaves.
They appear in a kind of semi-glo-bular form, only terminating in a
point at the top; which form, and likewise the work, or
facets thereof, covering the whole face of the stone, being more equal,
exhibit a more even display of beauty than a brilliant, whose lustre
is derived from the angles, or facets, of the sides only. And as their
angles are larger than those of a brilliant, they throw forth more
copious rays; the lustre of which appears to be equivalent to the
sparkling vigour of the smaller, and more numerous angles of a
brilliant.
