Chemical and physical properties (Average value)

Chemical properties:

- CaCO3: 99.1%
- Fe2O3: 0,03%
- Mg CO3: 0,8%

• Moisture ex-work (iso 787/2): <0,2%
• Loss on ignition (iso 3262) :  43,8%
• Matter insoluble in hcl (iso 5796/1): 0,10%  
• Ph in water solution (iso 787/9): 9 ±0,5

• Hardness: MOHS 3
• Specific gravity (ISO 787/10): 2,7
• Index of refraction: 1,59