Where is this from? And is it junk?

by Dee
(Berkeley, CA, USA)

Hi there.

I'm shopping around to purchase a replacement for my great-grandmother's rose-gold cross pendant which I (sob!) lost a few weeks ago. I'm on a limited budget & frankly, know virtually nothing about antique/vintage jewelry.

At any rate, I saw this (see attached photo) over the weekend & am wondering where it's from, approximately what its vintage is (assuming it is indeed "vintage" or "antique") and whether it's junk or not.

Here's the info:

1.5 " long x 1.0 ' wide
Mark: k14
Mark: B 26
Mark: Greek Temple of Parthenon

Will very much appreciate any tips you can provide.

Best,
Dee