Top 4 Small-Cap Stocks In The Nonmetallic Mineral Mining Industry With The Highest Operating Margin

Below are the top small-cap nonmetallic mineral mining stocks on the NYSE, the NASDAQ and the AMEX in terms of operating margin. The trailing-twelve-month operating margin at L&L Energy Inc

is 21.89%. LLEN's ROE for the same period is 33.10%. The trailing-twelve-month operating margin at Rhino Resource Partners LP

is 9.73%. RNO's revenue for the same period is $329.75 million. The trailing-twelve-month operating margin at Harry Winston Diamond Corporation

is 8.18%. HWD's PEG ratio is 0.31. The trailing-twelve-month operating margin at China GengSheng Minerals Inc

is 2.17%. CHGS' revenue for the same period is $71.95 million.