Vintage Pierre Cardin Zodiac Aquarius Pendant Necklace, Gold tone w/ Diamond

This necklace is gorgeous and rare! It reminds me of something Local Eclectic might carry these days. After digging around, I found that this was from a collection by designer Pierre Cardin in the 60s or 70s. All research indicates that the gem is a genuine diamond chip, but I found mixed info on whether it is gold plated or simply gold toned, so I don't want to make any assumptions there. Whatever the case, it's SO beautiful and unique, and if I were an Aquarius I'd be tempted to keep it myself! There is a small gold tag at the clasp that has the maker mark on one side and the dates for the Aquarius sign on the other. One of my favorite pieces I've ever come upon--hoping to find other signs to offer! Offering it for less than I've found it sold anywhere else.