Search for: [Characteristics of the object- texture/facture = "dark\-gray\-brown color \(10 YR 4\/2\) in the central part of concretion gray darkens towards the bark gradually to dark gray \(10 YR 4\/1\), to light gray \(10 YR 7\/1\) mostly in the parts closest to cortex\; this color difference seems to have no reflection in the mass texture\; large, indistinctly tabular concretions"]