Ground stone celts (adze and chisel blades). Source: Katzie.ca
Hmmm: the pictures are low resolution, there isn’t much annotation, many are of replicas, and the page design HTML is wonky, causing a lot of sideways scrolling. Yet I really like the Katzie First Nation’s artifact gallery. And no, its not only because they give ground stone its rightful pride of place. Though, in the image above, feast your eyes on the uppermost left specimen – an unusual yet definitive example of a broad celt being bisected to form two narrow ones. In essence, an adze is being turned into two chisels. Chew on that, Spaulding and Ford. Also check out the specimens in the centre-right, where the sharpened bits differ in colour from the bodies. These are either patinated specimens subsequently reground and recycled, or speak to a process of heat treating or oiling or similar to enhance the raw material. You could read all about this in my M.A. thesis if it were online, which it isn’t. Or wasn’t until five minutes ago. But I digress.
What I like is the text associated with these images.
Northwest Coast Archaeology 