Strathearn bought a bad of granite dust from a lcoal builder and this was used to make the Stoer weights.
Angus Sillars, the designer at Strathearn, came from a nautical family and used to enjoy sailing. He sometimes stayed in the village of Stoer and sailed around the Stoer coastline past rocks called The Old Man of Stoer and the headland Called Point of Stoer so he named this new design "Stoer"
Dave Moir, head glassmaker at Strathearn told me this story and it is always nice to pass on snippets of information like this