A grey stone with an egg-like shape and a single shallow groove around the circumference.

A small oval-shaped grey stone with a very shallow groove around the circumference.

A small rounded grey stone with a single shallow groove all around the middle.

A grey stone that has a relatively egg-like shape and a slight groove at each end.

A fairly smooth black stone with a long thin shape that is fairly triangular in cross section. One side is consistently flat, except for a slight horizontal bump. Two other sides are fairly rounded side-by-side mirror images of each other with a slightly tapered flat triangular section at an angle in between them to one end, creating a straight edge.

A small rather rough blue-grey stone that has a rectangular shape with both sides curving convexly to a point, creating an edge at one end which is slightly more flared than the other end.

A smooth black stone that has a flat oblong rectangular shape with one side flat tapering at an angle to a point and the other side slightly curving convexly to a point, creating an edge at one end which is more flared than the other end.

A small smooth grey stone that has a flat rectangular shape with one side slightly curving convexly while tapering at an angle and the other side curving convexly to a point, creating an edge at one end which is more flared than the other end.

A fairly rough grey stone that has a long flat oblong rectangular shape with one side flat tapering at an angle to a point and the other side slightly curving convexly to a point, creating an edge at one end which is more flared than the other end.

A rough grey stone, in a somewhat oval shape. Moderately smooth, darkened, deep, round hollow in the top, at the centre. The hollow appears to be full of soot?