Tortoiseshell and Esperite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.25-1.35
  
4.28-4.42
  
Fracture
Not Available
  
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic
  
Cleavage
Not Available
  
Distinct on [010] and [100] poor on [101]
  
Mohs Hardness
Not Available
  
5-5.5
  
Chemical Composition
Not Available
  
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
  
Tortoiseshell and Esperite Chemical Formula
While comparing Tortoiseshell 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 Tortoiseshell and Esperite chemical formula.
>- Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
Tortoiseshell and Esperite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tortoiseshell and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tortoiseshell and Esperite Optical Properties during the identification of gemstone. Specific gravity of Tortoiseshell is 4.28-4.42 whereas that of Esperite is 4.28-4.42.