Color: Cecil
Black Chert ranges from a medium gray to black
with mottling of brown, yellowish brown, or yellowish red present.
Texture: Fine grain
Luster: Dull to waxy
Translucency: Opaque
Silica Fabrics / Fossils:
Patina:
Heat Treatment: Heat treatment darkens
the color and brings out hues of red and increases the luster.
Knapping:
Distribution:
Distribution Comments:
Cecil Black Chert is associated with the Newark Gabbro Formation of
northwestern Delaware and southeastern Pennsylvania. Primary
outcroppings are on Iron Hill in Cecil County, Maryland.
Projectile point made from this material:
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Heat
Treated
