What is blacking made from?

The main ingredient in blacking is graphite or plumbago, also called black-lead, because on paper it makes a shining mark like lead. What is black lead po...

Is my Howlite real?

The hardness of howlite is about 3.5 and Turquoise is 5-6 on the Mohs hardness scale. This test will help to determine whether it is real or fake. If it i...