Mineral guide Carley Moses
Gypsum • • • • • • • •
Luster: non metalic Cleavage: (010) Fracture: fiberous Colour: colourless or white Streak: white Hardness: softer than a finger nail Mos: 1.5-2 Special properties or usages: drywall
Graphite • • • • • • • •
Luster: metalic Cleavage: basel Fracture: flakey Colour: black Streak: black Hardness: harder tha a finger nail Mos: 1-2 Special properties or usages: plastic and lead
pyrite • • • • • • • •
Luster: metalic Cleavage: indistinct Fracture: very uneven Colour: gold Streak: gray Hardness: harder than a finger nail Moes: 6-6.5 Special properties or usages: fools gold
Feldspar • • • • • • • •
Luster: non-metalic Cleavage: triclinic Fracture: along cleavage planes Colour: red Streak: colourless or white Hardness: harder than glass Moes: 6-6.5 Special properties or usages: bathrooms and tiles
Quartz • • • • • • • •
Luster: non-metalic Cleavage:indistinct Fracture: conchoidal Colour: colourless Streak: colourless Hardness: harder than glass Moes: 7 Special properties or usages: optics and sandpaper
Biotite mica • • • • • • • •
Luster: non-metalic Cleavage: perfect on (001) Fracture: micaeous Colour: brown Streak: white Hardness: softer than a finger nail Moes: 2.5-3 Special properties or usages:constrain ages of rocks
magnetite • • • • • • • •
Luster: metalic Cleavage: indistrict Fracture: uneven Colour: black Streak: black Hardness: harder than glass Moes: 5.5-6.5 Special properties or usages: magnetic
Talc • • • • • • • •
Luster: non-metalic Cleavage: basal Fracture: flat surfaces Colour: light green Streak: white Hardness: softer than a finger nail Moes: 1 Special properties or usages: baby powder make up
Hematite • • • • • • • •
Luster: non-metalic Cleavage: non Fracture: uneven Colour: red Streak: red Hardness: harder than a finger nail Moes: 5.5-6.5 Special properties or usages: face paint
Barite • • • • • • • •
Luster: non-metalic Cleavage: perfect along parallel to the base Fracture: irregular/uneven Colour: red/gray Streak: white Hardness: harder than a finger nail Moes: 3-3.5 Special properties or usages: Weight agents for drilling muds
Calcite • • • • • • • •
Luster: non-metalic Cleavage: perfect on (1011) Fracture: conchoidal Colour: white Streak: white Hardness: harder than a finger nail Moes: 3 Special properties or usages: Used in world war 2 for gun sights, anticides
Fluorite • • • • • • • •
Luster: Cleavage: ortachedral Fracture: subconchoidal to uneven Colour: all of the above Streak: white Hardness: harder than a finger nail Moes: 4 Special properties or usages: Thooth past, mouthwash
Galena • • • • • • • •
Luster: metalic Cleavage: cubic Fracture: subconchoidal Colour: gray to silver Streak: lead gray Hardness: harder than a finger nail Moes: 2.5 Special properties or usages: Lead acid batteries
Halite • • • • • • • •
Luster: non-metalic Cleavage: perfect 3 direction cubic Fracture: conchiodal Colour: colourless or white Streak: white Hardness: harder than a finger nail Moes: 2-2.5 Special properties or usages: rock sault
Muscovite mica • • • • • • • •
Luster: metalic Cleavage: perfect Fracture: micaceous Colour: gold Streak: white Hardness: softer than a finger nail Moes: 2 Special properties or usages: Production of wall boreds
sulfur • • • • • • • •
Luster: non-metalic Cleavage: none Fracture: smooth Colour: bright yellow Streak: yellow Hardness: softer than a finger nail Moes: 1.5 Special properties or usages: matches, fireworks