The 29th Minerama festival of fossicking, gems and jewellery was due to get underway at Glen Innes on Thursday, Friday, Saturday and Sunday.
The organisers said that between 90 and 100 traders had registered for the big annual festival.
Some of the traders have registered from as far away as Melbourne in the south and from Bundaberg to the north. The organisers said that they expect up to 1,500 people to attend the three day festival and the field trips before.
One of the highlights was to be a speech given by renowned geologist, Doug Stone, at the Minerama dinner on Saturday night.
He has built a national reputation as a writer on gold prospecting, gemstones, minerals and fossils.