The two main devices (symbols) in the Cardew blazon are the bezant and per fesse. The two main tinctures (colors) are sable and or.
Sable, the deep black so often found in Heraldry is believed to named from an animal of the marten family know in the middle ages as a Sabellinœ and noted for its very black fur 1A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Sable. In engravings, when colors cannot be shown it is represented as closely spaced horizontal and vertical lines, and appropriately is thus the darkest form of hatching, as this method is known 2Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 26. Although it may seem a sombre tone, and does indeed sometimes denote grief, it is more commonly said to represent Constancy 3The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P35.
The bright yellow colour frequently found in coats of arms is known to heralds as Or, or sometimes simply as Gold.4Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 27. Along with, argent, or silver it forms the two “metals” of heraldry – one of the guidelines of heraldic design is that silver objects should not be placed upon gold fields and vice versa 5A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P85. The yellow colour is often associated with the Sun, and the zodiacal sign of Leo.6Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53.
For easy recognition of the items on a coat of arms, and hence the quick identification of the owner, bold simple shapes are best. Hence, simple geometric shapes are often used for this purpose 7A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P146xz`, and the bezant Is a typical example of this, and in British Heraldry always takes the tincture or. It shares the same root as the name Byzantium, being associated with the gold coin of that city and indeed, in some heraldic traditions is represented as a coin-like disk in perspective. Wade suggests that the use of this device refers to ” one who had been found worthy of trust and treasure.” 8The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P122
The background of the shield can be divided into two potrtions in a variety of ways, and each portion coloured in a different fashion. In European Heraldry there is a tendency to use these areas to combine two different coats of arms, but in British and Scottish heraldry the preference is to treat the divided field as a single decorative element with other features placed as normal. Whatever tradition is followed, one of the most common divisions is per fesse, a simple separation along a horizontal line. 9Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P63. Not quite as common as the alternative vertical partioning, per pale it still presents a pleasing aspect 10A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Party.