The Georgian era of British history is a period that is normally defined as the time of the reigns of the first four Hanoverian kings of Great Britain. These kings were all named, as you might have guessed, "George". George the 1st through the George the 4th, 1714 to 1830. The period ended as Victoria, the last Hanoverian monarch took the throne in Britain in 1837.
The jewelry from the Georgian period is often silver on gold, but there are pieces made completely in silver and some made completely in gold. The diamonds used in Georgian jewelry are most often rose cuts or a variation of the rose cut. Many of these cuts look more primitive as compared to the diamonds we see in current jewelry.