Rock crystal intaglio seal. 1790

A very fine foiled rock crystal intaglio of Apollo with a lyre. A very similar depiction of the same subject by both Brown and Birch exists but with the lyre  through the neck.. This intaglio is a remarkably small size with a width of only 10mm, it is of equal quality to any of the master intaglio carvers of the period.

Mounted in a gold fob seal, English c.1790.