and
another of rock-crystal, and a carnelian ring was discovered in a tomb
in southern Russia. Each of these bears an engraved design. Two
carnelian rings are in the British Museum.
Chalcedony
rings, that is, rings entirely formed of this stone, while quite rare,
are represented by a few specimens. We describe elsewhere the so-called
betrothal ring of the Virgin at Perugia,52 and the British
' Museum has a large example of a chalcedony ring, with the hoop
rounded on the outer side, and a raised bezel that has been roughly cut
so as to indicate a human head, some scratches marking the hair. The
work is late Roman and the inscription shows that it was made for some adherent of the Gnostic sect.53
A
large ring, entirely of rock crystal, shows on the oval flattened
surface of the upper part a curious combination of the " Tau Cross,"
with superposed " chrisma," and with a serpent twined about it,
recalling the brazen serpent of Moses, the view of which restored
health to the diseased; the Greek letters, alpha and omega,, "
the beginning and the end," complete this interlacing of Old and New
Testament emblems; the doves facing the cross are the faithful to whom
the Cross of Christ brings salvation.54 Another entire
crystal ring bears on its flat face a design of somewhat similar
import, with, however, the curious difference that the lower
52 See
pp. 222, 258-261 of present work, and plate opposite p. 316 of the
writer's, " The Curious Lore of Precious Stones," Philadelphia and
London, 1913.
53
F. H. Marshall, Catalogue of the Finger Rings, Greek, Etruscan, and
Roman, in the Departments of Antiquities, British Museum, London, 1907,
p. 110, No. 654, pi. xvii.
54 Bosio, " Roma Sotteranea," Romiae, 1672, vol. i, p. 211.