Lawsonite and Esperite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.09
  
4.28-4.42
  
Fracture
White, Yellow, Pale blue, Brittle, Uneven
  
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic
  
Cleavage
Perfect on {100} and {010}, imperfect on {101}
  
Distinct on [010] and [100] poor on [101]
  
Mohs Hardness
8
  
5-5.5
  
Chemical Composition
Not Available
  
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
  
Lawsonite and Esperite Chemical Formula
While comparing Lawsonite and Esperite 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 Lawsonite and Esperite chemical formula.
>- Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
Lawsonite and Esperite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Lawsonite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lawsonite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Lawsonite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.