S-1789 (Kenneth Chert): Unknown collection procedure. Collection includes raw material. S-1789 (Kenneth Chert): Grainy variety. Kenneth Chert, also known as Lafayette Speckled or Eel River, is a white ...
L-186 (Kenneth Chert): Unknown collection procedure; Collection includes raw material, outer surface, and naturally-weathered specimens. L-186 (Kenneth Chert) Kenneth Chert, also known as Lafayette ...
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