Exploration for possible diamondiferous kimberlite in the Colton area of western Eyre Peninsula, located approximately 95 km south-east of Streaky Bay and 35 km north-east of Flinders Island, has formed part of a regional search by Orogenic Exploration that embraces four contiguous licences covering the Elliston district. The majority of work performed to date has consisted of intensive surficial sediment sampling and test drilling of bedrock on Flinders Island (in EL 2577), with activity on the adjacent mainland being restricted to a detailed re-evaluation of the results of extensive previous diamond exploration done by De Beers and Diamond Ventures, and interpretation of open file geophysical surveys to try to find untested target anomalies. The density of past surface loam sampling on the mainland, with heavy mineral sample locations often being >10 km apart, is regarded by Orogenic as leaving the kimberlite potential of many areas inadequately assessed, as based on their Flinders Island experience. A single large sample of beach gravel fines, taken from near the base of a sea cliff eroded into sediments of the Mesoproterozoic Blue Range Beds on the coastline close to Talia Caves, was separated out and its heavy mineral concentrate was examined for possible kimberlite indicator minerals, to test whether Mesoproterozoic or older kimberlite might be present in the area. This sample reported negative for such indicators, so the conclusion drawn is that the Blue Range Beds did not have kimberlite in its drainage area, and could not be shedding any indicator minerals into younger sediments. Due to the limited exploration completed, it is considered that local presence of diamondiferous kimberlite in the EL 2929 area is still possible.