Krishna Diamond Tools Pvt. Ltd. Manufactures Curvings for Avoiding Bacterial Growth. Krishna Diamond Tools Pvt. Ltd. Manufactures Stone Covings, Stone Covings India, GMP Covings, Kota Covings, Kotah Coving, WHO-GMP Covings, WHO GMP Covings, Curvings, Pharma Covings, Pharmaceuticals Covings, Clean room Covings, Cleanroom covings etc. The Curvings for Avoiding Bacterial Growth have two unique patterns and size of stone covings i.E. Classic and Premium in Kota stone material to absorb the potential of Stone Covings in the growing pharmaceutical industry in India.