Looks like the Stem could be broke off and if that is the case it would be hard to tell what type it is. Would be good to have something in photo to know what size it is.
The trouble is we can’t tell you if it’s a spear point, arrowhead or any other. Without that base it’s age (or time period ) is not identifiable.
It seems well made though and I really like the quality of that quartz.