Every year LCS Laboratory analyzes hundreds of Vermiculite samples for asbestos content. In this post we want to explain and show you what we see in your sample under the microscope.
Vermiculite is a mica like natural mineral. Once heated, it expands producing lightweight granules which are commonly used as adsorbent and heat insulation. Some vermiculite mines may have elevated levels of asbestos. It is important to understand that asbestos in vermiculite is a part of the 
mineral and not a contamination introduced during production. The image on the right shows an asbestos crystal (bundle) growing from a cluster of vermiculite plates.
During our analysis we collect asbestos crystals, identify the type of asbestos and report our findings to the client. When asbestos is separated from vermiculite, it looks like a grey fibrous rock. Asbestos is very dangerous. When we analyze your samples, the sample is prepared and analyzed in fume hoods. You should not try to 
perform any experiments with vermiculite or examine it without professional safety equipment.
If you’d like to test your attic insulation for asbestos, please explore our FAQ page for sampling instruction, pricing and shipping information.
