Shape

The shape of moldavites we find today is the result of several stages in their history: their initial formation and rapid cooling, followed by cracking and fragmentation, and finally transport and abrasion after they reached the ground. 

Some moldavites preserve their original primary shapes, formed while the molten glass was cooling in flight. These can include drops, spheres, and distinctive dumbbell-like forms and are relatively rare.

Other specimens have angular shapes, created when the rapidly cooled glass developed internal stresses and later fractured or broke into smaller pieces.

Some moldavites are more rounded and pebble-like. These shapes can result from long-distance transport and abrasion, during which sharp edges and surfaces were gradually worn down by contact with sediment, water, and other rocks.

Therefore, a moldavite's shape can provide clues about its original formation and the processes it experienced afterward.