This week we feature a picture of a biface found near Slave Lake, AB, a common stone tool in Alberta. The term biface is a generic stone tool classification, and simply refers to any thin piece of worked stone that has been flintknapped on both sides, or faces, of the artifact. So it can include tools like knives, arrowheads, and spear points, and certain types of cores. This biface is made of a fine-grained quartzite, and has been extensively worked around the margin to create a sharp cutting edge. The artifact exhibits a waxy luster, or sheen, that may indicate that it was heated to improve the quality of the raw material. Similar bifaces have been found in the foothills region and argued to be diagnostic of, or firmly associated with, the early middle period (5000 to 7500 BP) and referred to as Embarras Bipoints (Jason Roe, 2009, “Making and Understanding Embarras Bipoints: The Replication and Operational Sequencing of a Newly Defined Stone Tool from the Eastern Slopes of Alberta”).