The recently completed tests were aimed at the production and expansion of super-coarse horticultural grades of perlite from the project.
Sunrise said the tests produced coarse expanded perlite with acceptable yields.
Bulk sampling confirmed that the perlite targeted for first production can be mined mechanically by excavator or by ripping using a bulldozer, without the need for more costly drilling and blasting.
Seven tons of the perlite bulk sample have been submitted to a process equipment supplier, which has arranged trial crushing and screening through production scale mobile processing equipment.
The group said the work will provide extra information on the crushing and screening characteristics of the perlite, allow for refinement of the mobile process plant design and provide information on yields of horticultural grade perlite.
Sufficient material is expected to be produced during crushing and screening of perlite to provide samples for expansion testing in a commercial furnace.
Tests have also been completed with a second major producer of cement and ready-mix concrete using the company's natural pozzolan.
Sunrise said the results are consistent with the results of previously announced tests and compare favourably with concrete made using coal power station fly ash, currently the most commonly used form of supplementary cementitious material (SCM).
Fly ash and natural pozzolan SCMs improve the long-term strength and resistance of concrete.
The group has arranged for 18 tons of material left over from the bulk sample to be submitted to a commercial custom grinding facility.
The grinding of this sample is expected to provide further information on grinding times and energy requirements for production of a finished natural pozzolan product.
The ground product will be supplied to a number of separate customers for evaluation.
Meanwhile, the group continues to advance its permitting work for the development of the CS project.
It expects to submit its draft plan of operations and reclamation permit as a joint application to the Federal US Bureau of Land Management and Nevada Division of Environmental Protection around the end of this month.
Sunrise executive chairman Patrick Cheetham said: "I am pleased to provide this detailed update on our progress with permitting and market development testwork as we continue to prove the value of our natural pozzolan and perlite with future customers.
“Gaining market acceptance is a long process for industrial minerals such as perlite and pozzolan but I am pleased with our progress and market developments mean both products are increasingly in demand.”