The three main devices (symbols) in the Gaston blazon are the escallop, owl and chequy. The three main tinctures (colors) are argent, gules and or .
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) 1. In a sketch or drawing it is represented by plain, unmarked paper 2.
The bold red colour on a heraldic shield is known as gules. It has a long history within heraldry, it is known that one of those who besieged the scottish castle of Carlaverock in 1300 was the French knight Euremions de la Brette who had as his arms a simple red shield.3. The word gules is thought to come from the Arabic gule, or “red rose” 4. Later writers associated it with the precious stone ruby and the metal iron 5, perhaps because of the red glow of iron in the heat of the blacksmith’s forge.
The bright yellow colour frequently found in coats of arms is known to heralds as Or, or sometimes simply as Gold.6. 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 7. The yellow colour is often associated with the Sun, and the zodiacal sign of Leo.8.
The escallopoccurs often in arms, represented as the outside of the shell, sometimes “fluted” of a different colour 9. It has been part of heraldic tradition almost from the beginning of the art, Henry III of England awarded Gules, 3 escallopes argent to Herbert de CHAMBERLEYNE in the 13th century, and it is present in the heraldry of almost all countries 10. It is believed that they were adopted as badges of those going to the Holy Land and can be found in the arms of many a crusading family. Hence Wade’s suggested association of the scallop with those that “complete long journeys to far countries” 11.
Birds of great variety occur throughout heraldry, at least in name 12. The owl has long been associated with heraldry and is depicted in a clearly recognised aspect, always with its face to the viewer. 13 It comes as no surprise that previous generations of heraldic writers ascribed to it the traits of “vigilance and acute wit”. 14
Chequy (a word with a surprising number of different spellings!) is what is known as a treatment, a repeating pattern usually used to fill the whole background of the shield with a series of alternately coloured squares 15. These squares are usually quite small (there should be at least 20 in total), giving the appearance of a chess board, but any combination of colours may be used. It can also be used as a patterning on some of the larger ordinaries, such as the pale and fess, in which case there are three rows of squares. Wade, an authority on heraldic meaning groups chequy with all those heraldic features that are composed of squares and believes that they represent “Constancy”, but also quotes another author Morgan, who says that they can also be associated with “wisdom…verity, probity…and equity”, and offers in evidence the existence of the common English saying that an honest man is a ”Square Dealer” 16.