While comparing Actinolite and Blue John 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 Actinolite and Blue John chemical formula.
Another important criteria for qualitative analysis of gemstones is Actinolite and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Actinolite and Blue John Optical Properties during the identification of gemstone. Specific gravity of Actinolite is 3.00-3.25 whereas that of Blue John is 3.00-3.25.
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