While comparing Poldervaartite and Fuchsite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Poldervaartite and Fuchsite chemical formula.
Another important criteria for qualitative analysis of gemstones is Poldervaartite and Fuchsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poldervaartite and Fuchsite Optical Properties during the identification of gemstone. Specific gravity of Poldervaartite is 2.77-2.88 whereas that of Fuchsite is 2.77-2.88.