Hercynite and Caledonite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.39
5.6-5.76
Fracture
ConchoidalGemdat.org, Uneven
Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
[001] perfect; [100] distinct
Mohs Hardness
7.5-8
2.5-3
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Hercynite and Caledonite Chemical Formula
While comparing Hercynite and Caledonite 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 Hercynite and Caledonite chemical formula.
- Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
- Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Hercynite and Caledonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hercynite and Caledonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Caledonite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 5.6-5.76 whereas that of Caledonite is 5.6-5.76.