All three of the design styles in the Georgian era suffered similar problems with the availability of precious metals and gemstones. At the time, the world was still very much beset with conflict. This meant that being that there was a lack of raw materials, many existing pieces of jewelry were re-appropriated to pay for the wars. This is especially true towards the end of the 18th century and into the early 19th.
Sadly, as a result, very little genuine Georgian jewelry exists today. As well as the reduced number of pieces being produced or surviving ones being used to finance the army abroad, Georgian jewelers had the habit of melting down pieces that went out of fashion. They would then re-use the metals and reset the gemstones. Even pieces that might have survived are very difficult to identify, as both makers and assay marks didn’t come into common use until much later. If a genuine piece of Georgian jewelry appears, it is far more likely to be dated towards the end of the period than the beginning.