Beautiful Rare Vintage Mermaid Pendant 🖤 ✨

This mysterious mermaid pendant is so awesome and unique, I'm so bummed about the cracks all throughout (please look at pics) I will note, I've had this for over 20 years (from an antique shop in Berkeley) and it's remained totally intact, despite the cracking. In the last photo, I held it up to the light because it's actually a deep green hue & almost looks to be stone, as opposed to the glass I thought it was 🖤✨