Vtg Mexican Hand Blown Glass Decanter Mercury Sphere Stopper RARE Cone Shape

1980s Mexican Hand Blown Glass Decanter Mercury Sphere Stopper RARE Cone Shaped Extremely hard to find in this shape!! I couldn’t find one anywhere on the internet. The Mercury on the stopper has a spot that has rubbed off and there is one stain/spot near the bottom (see pictures). The second picture shows the stopper turned to the back side, so it will still display very nicely. Other than that, this is an incredibly stunning and larger piece weighing in at apx. 3.4 lbs.