the.com/crystalball

means A crystal sphere used (or claimed to be used) for fortune-telling and gazing into the future, often invoked as shorthand for any attempt to predict what's coming.

from From "crystal," via Old French and Latin from Greek "krystallos" — which meant both ice and rock crystal, since the ancients thought clear quartz was water frozen so hard it would never melt — plus plain "ball." The practice of staring into a polished sphere to see visions is called scrying, an old word related to "descry," meaning to catch sight of something far off. Gazers favored beryl and quartz spheres for centuries, and "crystal ball" settled in as the everyday name for the fortune-teller's globe.