Some are rounder such as green tree pythons and some are longer such as burrowing python eggs. Soft pliable exteriors. Lizards are typically jelly bean shaped and some such as gecko eggs are round. Many lizards such as geckos have very thin shelled eggs that are brittle and easily destroyed when touched. Some of their eggs are pliable like python or colubrid eggs while the eggs of many geckos are hard like miniature bird eggs.
Many tortoises have round hard walled eggs.
Box turtles may have long eggs. Do not rotate these eggs whenever possible. Placement of eggs on the substrate I will typically try to cover eggs half to two thirds the way with the vermiculite. This is not always critical if the humidity levels are sufficient within the egg chamber. This depends on the species and the temperatures used.