Search for: [Characteristics of the object- texture/facture = "silica matrix mostly very homogenous in texture\; nonhomogenous inside the concretion\: black middle part of the concretion \(10 YR 2\/1\), the size of this part in comparison to the rest of the concretion may differ very much\; the black core is surrounded by dark grey mass \(10 YR 3\/10\) or very dark grey\-brown mass \(10 YR 3\/2\), the division between the colours of the core and the surrounding mass is very clear"]

Number of results: 0