[287] PIERRET, _Catalogue de la Salle Historique_, No. 481.
The ring given by Pharaoh to Joseph as a sign of the authority delegated to him, may have been such as this.[288] The cheapest rings had bezels of faience or schist covered with enamel. The scarabs were cut as a rule from soft stone.
In gem-cutting the Egyptians made use both of the intaglio process and of relief, but the greater fitness of the former for the work to be done by a signet made it their especial favourite. They were ignorant of the process we call cameo, in which the differently coloured layers of the sardonyx are taken advantage of to produce contrast of tint between the relief and its bed.
A few Egyptian cylinders, in earthenware or soft stone enamelled, are known. They bear royal ovals; the British Museum has one which seems to date from the twelfth dynasty. Their employment seems never to have become very general.[289]
[289] BIRCH, _History of Ancient Pottery_, p. 72. PIERRET, _Catalogue de la Salle Historique du Louvre_, Nos. 499, 500, 505.
§ 9. _The Principal Conventions in Egyptian Sculpture._
Whether it were employed upon wood, upon limestone, or upon the harder rocks, whether it were cutting colossi in the flanks of the sandstone hills, or carving the minute images of its gods and kings in the stone of a signet ring, the art of Egypt never shook itself free from those intellectual conceptions which were impressed upon its first creations; it remained true to the tendencies of its infancy; it preserved the same fundamental qualities and defects; it looked upon nature with the same eyes, and interpreted her in the same fashion, from the first moment to the last.
These methods and processes, and the conventionalities of artistic interpretation which maintained themselves through all the changes of taste, have still to be considered. They are the common features by which works which differ greatly in execution are brought into connection, and are to be found as clearly marked in a statue dating from the time of Amasis and Nectanebo as in one from the Ancient Empire.
Some of the conventions of Egyptian art are to be explained by the constitution of the human mind and by the conditions under which it works when it attempts plastic reproductions for the first time; others appear to spring from certain habits of thought peculiar to Egyptian civilization. There is yet a third class which must be referred to purely technical causes, such as the capabilities of the materials and tools employed. The influence which these exercised over the artistic expression of thought has been too often underrated. We shall endeavour to recognize their full importance.