Is a Lead Sulfide with formula PbS, hardness is 2.5
Very popular among mineral collectors ,widespread around the world,is considered a common mineral ,and important ore for lead and silver.
Rarely seen in facet gem,cutting is not very easy due to it’s perfect cleavage in four directions.The surface may turns dull during time, a little cotton brushed will make it shiny again. This material comes from Viburnum Trend,Mo,USA.
Weight: 14.56 ct.