Polished Mixed Pink Agate Mineral Specimen Group [32]

A molar from Coelodonta antiquitatis with root. 138 grams, 93 mm



From a Cambridgeshire, UK, collection.

The form of the woolly rhino’s skull and teeth had evolved to support its grazing lifestyle with its head dipped downwards towards the ground, even in its relaxed attitude. The skull is unusual in having both an extensively ossified nasal septum, probably evolved as a result of the heavy pressure on the horn and face when grazing, and a down-turned anterior region on the premaxilla that contacts the edge of the upper jaw. The shoulders were raised with a powerful hump, used to support the animal's massive front horn and also used for storing fat.

Comprising large cut sections of pink dolomite with dusting of marcasite. 1.3 kg total, 61-95 mm



From Touissite, Morocco, North Africa. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.

From Carcharocles megalodon polished, showing some good enamel. 369 grams, 11.9 cm



From Aurora, North Carolina, USA. From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.

Carcharodon megalodon is regarded as one of the largest and most powerful marine predators in vertebrate history and likely had a profound impact on structuring of the marine communities. Fossil remains indicate that this giant shark reached a length of more than 16 metres (52 ft) and also affirm that it had a cosmopolitan distribution. Scientists suggest that in life it looked like a stockier version of the great white shark, Carcharodon carcharias.