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Noun
1. a brownish iron sulfide mineral FeS having weak magnetic properties
(synonym) pyrrhotite, pyrrhotine
(hypernym) mineral

The following video provides you with the correct English pronunciation of the word "magnetic pyrites", to help you become a better English speaker.

General Information:
 Chemical Formula:
Fe(1-x)S (x=0-0.17)
 Composition:
(Molecular Weight = 85.12 gm)
Iron 62.33 % Fe
Sulfur 37.67 % S 
 Empirical Formula:
Fe2+0.95S
 Environment:
Wide spread occurrences in igneous and metamorphic rocks.
 Locality:
Sudbury, Ontario, Canada and Santa Eulalia, Chihuahua, Mexico.
 Name Origin:
From the Greek, phrrhotes, "redness," in allusion to color.
Physical Properties:
 Cleavage:
[0001] Imperfect, [1120] Imperfect
 Color:
bronze, bronze red, or dark brown.
 Density:
4.58 - 4.65, Average = 4.61
 Diaphaniety:
Opaque
 Habits:
Tabular - Form dimensions are thin in one direction., Platy - Sheet forms (e.g. micas)., Massive - Granular - Common texture observed in granite and other igneous rock.
 Hardness:
3.5-4 - Copper Penny-Flourite
 Luminescence:
None.
 Luster:
Metallic
 Streak:
gray black
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