The main device (symbol) in the Kuszaba blazon is the millstone. The main tincture (color) is argent.
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.
Although we expect to find fierce creatures and fearsome weapons depicted in a coat of arms this is not always the case – sometimes simple household objects are used 3A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P281. The ENTRY is a typical example of this. Sometimes these objects were chosen for the familiarity they would have for the obsever, helping them identify the owner, and sometimes they were used because of some association with the owner, or a similarity to the family name. 4Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 100