It is easily recognized by its normal, distinctive deep red color and the presence of small, round inclusions which superficially resemble ooliths. The color will vary to dark green, dark blue or almost black, but these colors are rare. In Gunflint Silica, the translucent to transparent matrix is dominant. The matrix is usually translucent and grey to bluish grey, but can vary to colorless and nearly transparent. Working quality is not as good as Jasper Taconite.
Inclusions consist of scattered small black granules resembling pepper grains.
The extent of its availability in glacial drift has not been evaluated, although it is present. Inclusions also dominate matrix in Kakabeka Chert. They give the material a distinctive fine, wood grain appearance. Color is generally a mixture of grey and brown. It is distinctive and easily identified.