Stibnite The Bladed Crystals
The color of stibnite is a shiny lead gray bluish lead gray steel gray or black It is metallically lustrous exceptionally soft hardness= with a lead gray to blackish streak and a density of Stibnite is sometimes partially replaced by stibiconite Sb 3 O 6 OH a powdery oxide and cervantite Sb 2 O 4 an antimony tetraoxide