This structure is surmounted by enamelled brackets mounted with step-cut emeralds, and by a faceted amethyst monde, set with table and rose-cut diamonds, rubies, spinels and emeralds, with a cross above set with further diamonds, with a table-cut diamond on the front, and an emerald on the reverse. Beneath the Cullinan diamond are further enamelled brackets, representing a crown, mounted with rubies and diamonds. The pommel of the sceptre is enamelled and mounted with rubies, emeralds, sapphires and diamonds.
The sceptre represents the sovereign's temporal power and is associated with good governance. During the coronation service the new sovereign is first anointed with holy oil, then robed in coronation robes, and then invested with a number of ornaments symbolising the chivalric nature of kingship. These include the spurs, swords and armills, followed by the orb, a ring and then the sceptres. The sovereign is presented with two sceptres - this one surmounted by a cross and another surmounted by a dove (which represents the Holy Ghost). After the investiture, the sovereign is then crowned.
The sceptre was originally made for Charles II, but has undergone a number of alterations, particularly in 1820 for the coronation of George IV, when an enamelled rose, thistle and shamrock were all added to the monde. The major alteration was made in 1910, when the sceptre was altered to receive the great Cullinan diamond. The structure which holds the diamond is hinged so that the stone may be removed and worn separately, although this has been done rarely. The sceptre also had to be reinforced as the weight of the diamond is so large.
According to www.rct.uk