The main device (symbol) in the Batten blazon is the axe. The two main tinctures (colors) are azure and argent.
The bright, strong blue color in Heraldry is known in English as azure, and similarly in other European languages – azul in Spanish, azurro in Italian and azur in French. The word has its roots in the Arabic word lazura, also the source of the name of the precious stone lapis lazuli 1A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Azure. Despite this, those heralds who liked to associate colours with jewels chose instead to describe blue as Sapphire. According to Wade, the use of this colour symbolises “Loyalty and Truth” 2The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P36.
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) 3Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. In a sketch or drawing it is represented by plain, unmarked paper 4A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P11.
The Axe appears in many forms in heraldic art, coming from both the martial and the craft traditions, indeed someone today would have a hard time telling their common hatchet from a turner’s axe, but it is likely that those in the middle ages were more familiar with each. 5A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Axe Obviously the axe from a craft tradition may symbolise the holder being a practitioner of that craft, but the axes from a martial background are suggested by Wade to indicate the “execution of military duty”. 6The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P100