A specimen that greatly resembles hedenbergite, and thought to be so by Patrick E. Haynes, Dr. Virgil Lueth and David Wells, was x-rayed and found to be amorphous. The specimen is assumed to be a limonite pseudomorph of hedenbergite.
Colour:
brown
Quality for species:
Rock forming mineral/non-crystalline/little interest for collectors.(##)
Abundance at site:
Very Rare
Confirmation
Validity:
Never found, but inferred to have existed at some point in the past (e.g. from pseudomorphs)