I have mostly read that an Athame is blunt! But with a very sharp point; used for carving candles! And also used in rituals, of course.
However, before Gerald Gardner, nobody practising witchcraft had heard of an Athame. My teacher formed the circle with her finger.
Crowley did write about knives and swords. I cannot remember reading anything about an Athame!
Personally I have never had one; nor a wand!