Color: Eyebrow Chert / Jasper ranges in color from tan to
orange, red or brown. Less commonly white to clear or dark brown
to black may be present. Dendritic inclusions are present.
Texture: Medium to fine grain
Luster: Waxy to vitreous
Translucency: commonly opaque, but may rarely
be translucent. Thin margins are translucent.
Silica Fabrics / Fossils:
Patina:
Heat Treatment:
Knapping:
Distribution:
Eyebrow Chert / Jasper is thought to be associated with the Madison Formation of
Montana. Primary outcroppings occur on Flint Creek, a tributary of
Clark Fork River near Drummond, Montana.
Projectile point made from this material:
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