Touchstone Meaning in Bengali

What is the meaning of word Touchstone in Bengali/Bangla ?

Defenition of word Touchstone

• a piece of fine-grained dark schist or jasper formerly used for testing alloys of gold by observing the color of the mark that they made on it.

Example

Small black stones were used as touchstones to test the colour, and hence purity, of gold.

Other Meaning of Touchstone

• NOUN

  কষ streak tannin touchstone
  কষ্টি touchstone trying testing streak plate
  কষ্টিপাথর touchstone touch
  নিকষ whetting whetstone touchstone streak plate

• MORE

  পরখ trial touchstone