Ceremonial dagger-ax?

Ceremonial dagger-ax by unknown artist. A stone object resembling a dagger-ax with a pointed tip and a rough, weathered surface. The object is gray with darker gray spots. It tapers to a point at the top. The bottom is uneven. A circular cutout with a cross is visible near the bottom. The object is attached to a stand by two small black bands. The background is light grey.