The main device (symbol) in the Boncza blazon is the unicorn. The two main tinctures (colors) are argent and azure.
Argent is the heraldic metal Silver and is usually shown as very pure white. It is also known more poetically as pearl, moon (or luna) 1Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. In a sketch or drawing it is represented by plain, unmarked paper 2A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P11.
Azure is the heraldic colour blue, usually quite a deep, dark shade of the colour (there is a lighter blue that sometimes occurs, known as celestial azure). If colour printing is not available then it can be represented by closely spaced horizontal lines in a scheme known as “hatching” 3Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 26. The word is thought to originate from the Arabic lazura and it represents the colour of the eastern sky. It is also said to be the colour associated by the Catholic Church with the Virgin Mary and hence of particular significance 4The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P150.
In the mediaeval period there was no real percieved difference between real and mythical animals, after all, much of the world remained unknown and who was to say what strange and magical creatures existed in distant lands? As heraldry developed a whole menagerie of imagined creatures 5Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P164 came into being, and their various representations became more or less standardised in form and appearance. The unicorn is an intresting example that is still part of our own mythology today. The unicorn as illustrated on even the most ancient coat of arms is still instantly recognisable to us today, and shares many of the same poses that both lions and horses can be found in. 6A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Unicorn. Wade, the 18th century heraldic writer suggested that were adopted as symbols because of “its virtue, courage and strength”. 7The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P85