Green chlorite powder

Chemistry: (Fe, Mg, Al)6(Si, Al)4O10(OH)8, Iron Aluminum Magnesium Silicate Hydroxide.
Class: Silicates
Subclass: phyllosilicates
Group: The Clays and also The Chlorite Group.  
Color is usually green but can also be white, yellow, red, lavender and black.
Luster is vitreous, dull or pearly.
Transparency: Crystals are translucent transparent.
Crystal System is monoclinic; 2/m.
Crystal Habits: Rarely in large individual barrel or tabular crystals with an hexagonal outline. Usually found as alteration products of iron-magnesium minerals and as inclusions in other minerals. Aggregates can be scaly, compact, platy and as crusts.
Cleavage is perfect in one direction, basal; not seen in massive specimens.
Fracture is lamellar.
Hardness is 2 - 3
Specific Gravity is variable from 2.6 - 3.4 (average to slightly above average)
Streak is pal green to gray or brown.