When is a pearl not a pearl?

Article Abstract:

The term 'pearl' is loosely used to refer to calcareous concretions found in different mollusks. However, the true definition of the word refers to the cyst or nodule of nacre that is formed separate from the shell of the bivalve creature.

Author: Cross, E.R.
Physiological aspects, Mollusks, Pearls

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Return to the Grosvener and the Diamond Knot

Article Abstract:

The advantages and disadvantages offered by shipwrecks as dive destinations are examined. These include the 'Grosvener' Knot' shipwreck off the coast of Africa and the 'MV Diamond Knot' shipwreck in the Strait of Juan de Fuca.

Author: Cross, E.R.
Diving (Underwater), Diving

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Memorable shipwrecks: the fascinating histories of 5 maritime disasters

Article Abstract:

The stories behind the disasters surrounding the Monitor, Titanic, Lusitania, Bismarck, and Andrea Doria are presented. The effect of these shipwrecks to the diving sport and to divers are also discussed.

Author: Cross, E.R.
Appreciation, Accidents, Shipping industry

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Subjects list: Evaluation, Shipwrecks
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