Sulphur Mineral Specimen Group [50]

A thick, cut and polished geode section showing attractive layering of white, grey, and brown agate; well-formed prismatic amethyst crystals above the agate layer; mounted on a custom-made display stand. 8.47 kg total, 65 cm including stand



From Artigas, Uruguay. Property of a London lady.

A Carcharocles megalodon shark tooth, with some serrations and good polished tooth enamel. 76 grams, 94 mm



Found Wrightsville Beach, North Carolina. Ex The Fossil Exchange. From a private Tyneside collection, formed since the early 2000s. Accompanied by a Fossil Exchange information card.

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.

Comprising ten large prismatic points, each transparent with some inclusions. 1.46 kg total, 61-95 mm



From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.