While comparing Tanzanite and Monazite 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 Tanzanite and Monazite chemical formula.
Another important criteria for qualitative analysis of gemstones is Tanzanite and Monazite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Monazite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 4.80-5.50 whereas that of Monazite is 4.80-5.50.