The Mineral BABINGTONITE
- Chemistry: Ca 2 Fe 2 Si 5 O 14 OH, Calcium iron silicate.
- Class: Silicates
- Subclass: Inosilicates
- Uses: mineral specimen
- Specimens
PHYSICAL CHARACTERISTICS:
- Color is almost always black to dark green.
- Luster is vitreous.
- Transparency: Crystals are generally opaque but thin crystals or splinters can be translucent.
- Crystal System is triclinic; bar 1
- Crystal Habits include short stocky prismatic crystals or tabular to platy forms.
- Cleavage is good in one direction and perfect in another, these are pinacoidal but are at near right angles to each other forming rectangular prisms.
- Fracture is uneven to subconchoidal.
- Hardness is 5.
- Specific Gravity is approximately 3.3 (somewhat above average for translucent minerals)
- Streak is brown to gray.
- Associated Minerals are quartz, apophyllite, feldspars, heulandite, stilbite, scolecite and other zeolites.
- Other Characteristics: weakly magnetic.
- Notable Occurrences include Poona, India; Devon, England; Baveno, Italy and several locations in Massachusetts.
- Best Field Indicators are crystal habit, color, associations with zeolites and luster.
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