Chelsea Filter with Magnifier

CHELSEA
FILTER ORIGINAL FOR EMERALDS and OTHER COLOR GEMSTONES – IDENTIFIES
RED, BLUE, GREEN GEMSTONES.The renowned CHELSEA FILTER is a must have
for identifying colored stones. While it was originally intended to
rapidly differentiate between genuine Emeralds and the pastes and
doublets which resemble them, it also is a valuable aid in identifying
other colored stones, as well. Designed to transmit only deep red and
yellow-green light, and the best results are obtained when stones are
examined under a strong electric light.

MAGNIFIER: