noun
relic
REL-ik/ˈrelɪk/
Something surviving from an earlier time.
The weathered bronze brooch is a relic displayed on a museum cushion.

Etymology
The pieces express leaving something behind. A relic is what remains: the word broadened from revered remains of holy people to objects surviving from the past.
In context
a copper or brass object was placed on the stone for a certain period of time possibly some kind of sacred Relic
More examples
- Workers uncovered relics of an ancient settlement beneath the road.
- This outdated rule is a relic of stricter times.
- The church preserves a saint's robe as a sacred relic.
Forms
relic · relics
reliquary noun — A container for sacred remains or objects.