Scored a box of glassware at an estate sale and this spiked glass lump was inside. It’s super heavy and the points are actually sharp. Is it a paperweight? What is this thing?

blend seamlessly into the water at the bottom of a vase.
4. Clues In The Design: Weight, Spikes, And Hole Patterns Explained
The design of a glass flower frog provides several clues to its function. Its weight ensures that it remains stable at the bottom of a vase, even when supporting a dense arrangement of flowers. The spikes, sharp and meticulously arranged, are critical to its use, providing numerous points of contact for securing flower stems.
Additionally, many glass flower frogs feature patterns of holes or indentations that coincide with