Black Walnut Block BW-390
3.6" x 3.6" x 9.7"
This Walnut blank includes both medium-brown heartwood and creamy brown sapwood, with a strip of wane on one edge. Note that the dimensions are of the widest part of the block -- the wane area removes some material. See 3rd photo for a sense of the cross-section dimensions. Heartwood dominates the block, approximately 70% of the volume, and it gradually lightens in color toward the sapwood. The grain is linear throughout.
I see no cracks or other potential flaws.