Chlorite Schist
What is Chlorite Schist?
Chlorite schist is a metamorphic rock primarily composed of chlorite minerals. It is characterized by its foliated texture, meaning the minerals are aligned in parallel layers or planes, giving the rock a distinct schistosity. The presence of chlorite imparts a green color to the rock, though other colors may be present depending on the impurities. Chlorite schist forms under relatively low-grade metamorphic conditions, often from the alteration of other rocks like shale, basalt, or volcanic ash. The rock's appearance can vary, with some specimens displaying a well-defined schistosity and others appearing more massive.
Optical Properties
- Refractive Index
- 1.57 to 1.67
- Birefringence
- Moderate to high
- Pleochroism
- Typically weak to moderate, with colors like pale green to dark green or blue-green.
- Optical Character
- Biaxial (-)
- Dispersion
- Moderate
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Chlorite Schist before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Chlorite Schist Localities Map
See where Chlorite Schist is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Green, gray-green, dark green, sometimes with hints of brown or black.
- Hardness (Mohs)
- 2 to 3
- Density
- 2.65 - 3.0 g/cm³
- Streak
- Greenish-gray to white
Chemical Properties
- Chemical Formula
- (Mg,Fe,Al)6(Si,Al)4O10(OH)8
- Elements
- Silicon, Oxygen, Hydrogen, Magnesium, Iron, Aluminum
Also Known As
Identify Chlorite Schist Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
Chlorite Schist FAQs
How do I identify Chlorite Schist?
Chlorite Schist can be identified by its hardness of 2 to 3 on the Mohs scale, Green color. Look for these key characteristics when examining specimens.
What color is Chlorite Schist?
Chlorite Schist typically appears in Green, gray-green, dark green, sometimes with hints of brown or black.. Color can vary depending on impurities and formation conditions.
How hard is Chlorite Schist?
Chlorite Schist has a hardness of 2 to 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.