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?

Estate sales are treasure troves for the curious and the collector alike, often harboring relics from the past that ignite our imagination and prompt us to ask, ‘What is this?’ Recently, an individual stumbled upon a box of glassware at such a sale, and nestled among the more recognizable items was a heavy, spiked glass object. Its unusual form and weight sparked questions: could it simply be a paperweight, or was it something more significant?