Symbols have lots of different meanings. It really does need a closer inspection of the whole necklace by an expert to decipher the symbols and to give a possible date and more valuable information. This could be a lovely piece of history you have there.
Maybe it was buried for a reason! especially if you are believer in having a personal item buried that once belonged to someone and must not be passed to others for spiritual reasons.
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Request for more information by: Yvonne Hammouda-Eyre
Steve, Leigh Leshner, the expert assigned to your question requests a full picture of the chain.
Just use another submission form and attach a photo of the full chain. I'll add the photo to your original submission manually. Oh, how long is this chain?