Phosphosiderite and Gypsum Physical Properties
Tenacity
Not Available
  
Flexible
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.74-2.76
  
2.20-2.40
  
Fracture
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Uneven
  
Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)
  
Cleavage
{010} Perfect, {001} Distinct
  
Perfect on {010}, distinct on {100}
  
Mohs Hardness
3.5-4
  
2
  
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
  
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
  
Phosphosiderite and Gypsum Chemical Formula
While comparing Phosphosiderite and Gypsum 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 Phosphosiderite and Gypsum chemical formula.
- Chemical formula of Phosphosiderite- Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
- Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Phosphosiderite and Gypsum Specific Gravity
Another important criteria for qualitative analysis of gemstones is Phosphosiderite and Gypsum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phosphosiderite and Gypsum Optical Properties during the identification of gemstone. Specific gravity of Phosphosiderite is 2.20-2.40 whereas that of Gypsum is 2.20-2.40.