A floater aggregate of orange-brown interpenetrated calcite crystals (variety glendonite). It features a group of equidimensional radial crystals. Good UV fluorescence. These have been considered traditionally as pseudomorphs after ikaite. However, data reported by Rogov and Zakharov (2010) indicate that glendonites are probably formed in deep-water facies and the overall paleoclimate could have reflected a period of high-frequency climate oscillations. Also, Geptnera, et al. (2014) have shown that glendonites could be formed with the contribution of bacterial communities.

This extraordinary big floater specimen is undamaged, and it was acquired in 1996. From my own collection.

Rogov, M., and Zakharov, V. (2010). Jurassic and Lower Cretaceous glendonite occurrences and their implication for Arctic paleoclimated reconstructions and stratigraphy. Earth Science Frontiers, 17, 8, 345-347.

Geptnera, A.R. Vetoshkinab, O.S. and Petrovaa, V.V. (2014). New Data on the Composition of Stable Isotopes in Glendonites of the White Sea and Their Genesis. Lithology and Mineral Resources, 49, 6, 473–490.