touchingtough
touchstone (English) [ IPA: ˈtətʃˌstoʊn ASM: টাচষ্ট’ন]
Contributed by: Barnali Deuri Bora on 2010-08-20
1. Physics(Material Noun-Neuter) a piece of fine-grained dark schist or jasper formerly used for testing alloys of gold by observing the colour of the mark which they made on it. সোণ পৰীক্ষা কৰা শিল।