augite and hornblende Flashcards
common mineral belonging to the pyroxene group
augite
a German geologist and the so called “father of German geology” discovered and named augite in ______
Abraham Gottlob Werner, 1792
color of augite
dark green, black, brown
streak of augite
greenish white
cleavage of augite
2 planes of cleavage which intersect at 90°
luster of augite
vitreous on cleavage and crystal faces
dull on other surfaces
Mohs Hardness of augite
5.5 to 6
Specific Gravity of Augite
3.2 to 3.6
Habit of augite
No apparent shape
Common Metamorphic Rocks Containing Augite
Granulite
Amphibolite
This is a complex inosilicate mineral belonging to the amphibole group.
Hornblende
Hornblende was discovered in _____ by French mineralogist ___________.
1801, René Just Haüy
The name Hornblende was originally given in ______ by ________________.
1789, Abraham Gottlieb Werner
Cleavage of hornblende
Imperfect at 56° and 124°
Luster of hornblende
Vitreous to dull
Streak of hornblende
Pale gray, gray-white, white
Color of hornblende
Black to dark green or brown
Specific gravity of hornblende
2.9
Fracture of hornblende
Uneven
Crystal system of hornblende
Monoclinic
The highest quality pieces of hornblende are cut, polished, and sold under the name ___________.
black granite
It is crushed and used for highway construction and as railroad ballast.
Hornblende
It is cut for use as dimension stone.
Hornblende
It is used for building facing, floor tiles, and countertops.
Hornblende
Hardness of Hornblende
5-6
