Gold-Plated Dagger Pendant Necklace

Bought from a boutique that used to be in Pacific Center Mall in Vancouver. The boutique is gone now and I don't remember what it was called. The stamp on the pendant reads "TNJ." This necklace feels solid and high-quality for a demi-fine piece. The gold-plating is a warm, rich gold (similar in color to Missoma's gold pieces), which may indicate 18-karat plating, but I don't remember for sure. Length is 24–26".