This is in old Cyrillic (Russian) script, used for church-related stuff and writings.
It's difficult to make out exactly what it says and I'm not very well versed in the script/language, but here's what I can make out:
икона наход в новом афоне
на кавказе
*икона - icon (religious image)
*нахо(д) - The last letter there doesn't look like any Cyrillic letter. Kinda looks like Lating “d”, so that's what I put in, and then the word sort of looks meaningful. Could be an old word that I don't know, could be short for “находится” which means “is located in.” Could be something else tho. The root наход can mean “find”.
*в новом - in new
*афоне - I think this is what it says. I couldn't read it at first, but then tried a few things and this city Новый Афон in Abkhazia came up, and it has some similar-looking monasteries, so this is a possibility. https://en.wikipedia.org/wiki/New_Athos
*на кавказе - in the region of Caucasus mountains.
So something about an icon in New Athos in the Caucasus.
Highly unlikely that it's gold. Perhaps someone can do better than I did.