is it edible?
Yes - It is edible when young, before the spores inside the fruit body disintegrate into a brownish powder.
Calvatia sculpta
It is edible when young, before the spores inside the fruit body disintegrate into a brownish powder. 
what is calvatia sculpta? A species of puffball fungus in the family Agaricaceae where is it commonly found? Mountainous areas in western North America
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Calvatia sculpta [SEP] Introduction
Calvatia sculpta, commonly known as the sculpted puffball, the sculptured puffball, the pyramid puffball, and the Sierran puffball, is a species of puffball fungus in the family Agaricaceae. Attaining dimensions of up to tall by wide, the pear- or egg-shaped puffball is readily recognizable because of the large pyramidal or polygonal warts covering its surface. It is edible when young, before the spores inside the fruit body disintegrate into a brownish powder. The spores are roughly spherical, and have wart-like projections on their surfaces. Originally described from the Sierra Nevada, "C. sculpta" is found in mountainous areas in western North America, and was found in a Brazilian dune in 2008.