Luna Norte Blue Teardrop Gem Gold Tone Necklace Mineral 7 inch Witchy Aesthetic

Brand is Luna Norte. 7 inch long thin gold tone necklace with a blue teardrop shaped gem charm attached to it. There's a small crescent moon charm on the back of the necklace as well. I'm not sure what gemstone it is; I recall the phamplet it came with saying it was a stone that represented "knowledge" but I no longer have the phamplet. Comes from a smoke-free and pet owner household. Pairs well with witchy, boho, gothic, dark academia, fantasy, cosplay, cottagecore, goblincore, minimalist and similar aesthetics.