Mineral Labs Inc. -- History Sampling Coal Analysis Sampling Coal Auger Sampling Metallurgical Coal On Site Labs Analytical Testing Coal Analysis Water Analysis Gypsum & Limestone... Transfer Customer Login Contact Us About Us Mineral Labs, Incorporated has been in operation since 1975 with our headquarters and original laboratory located in Salyersville, Kentucky.... MLI has grown to include 18 laboratories in 6 states and over 200 employees. MLI specializes in coal, soil, water, wood, oil, natural gas, biomass, gypsum, and limestone sampling...