di/soro sillicates

Question 1

which di/soro silicates do you need to know for the exam?

Answer 1

epidote

allanite

Question 2

identify the follwing di/soro sillicate:
habit:
- lab specimine is anhedral
- would be prismatic when not in the lab 
aggregation:
-lab specimine is massive 
colour:
- pistachio green 
- no streak
hardness:
- 3/4
lustre:
- earthy/dull
cleavage:
- one good direction (not always visible)

Answer 2

epidote

Question 3

what property of epidote should you remember to identify it in the lab?

Answer 3

• it has a psitachio green colour, has one cleavage direction and the massive specimine appears almost mossy

Question 4

what does the allanite specimine look like?

Answer 4

Small tabular grey hexagonal pieces or massive brownish red piece