perlite - screened and partially dried perlite pellets and popped perlite - set of two 2-ounce jars Perlite is mined

Perlite is mined

with no mention of Lehmann

They are on  a cream paper that is only very slightly edge-toned

Making multiple purchases

The asbestos from the McIlroy Mine was mainly sold to the Powhatan Mining Company for use in crucible filters

perlite - screened and partially dried perlite pellets and popped perlite - set of two 2-ounce jars Perlite is minedPerlite is a hydrated form of obsidian. When a mass of obsidian picks up water, it devitrifies and becomes amorphous perlite. The unhydrated core of the obsidian mass may weather out as an obsidian spherule called an Apache Tear. Perlite can also form by the sudden cooling and solidification of rhyolitic volcanic ash, which traps water into its mass. Perlite is mined, crushed, partly dried in a rotary kiln and screened to various sizes depending on