Step 1: Properties of Rhodochrosite.
Rhodochrosite (MnCO$_3$) is a carbonate mineral, typically pink to rose-red in color, with vitreous luster and perfect cleavage.
Step 2: Confusing mineral.
Orthoclase feldspar can also occur in pink varieties (commonly called "pink feldspar"), visually resembling rhodochrosite in hand specimen.
Step 3: Why not the others?
- Wollastonite: usually white/gray fibrous.
- Gypsum: softer, transparent/white.
- Biotite: dark brown/black mica.
Final Answer:
\[
\boxed{\text{Orthoclase}}
\]
Consider two intersecting, north-easterly striking and south-easterly dipping dikes Y1 and Y2, which are exposed on an east-west trending vertical wall of a granite (X) quarry as shown below.

The angle that the dikes make with the horizontal on the quarry wall is
Is there any good show __________ television tonight? Select the most appropriate option to complete the above sentence.
As the police officer was found guilty of embezzlement, he was ___________ dismissed from the service in accordance with the Service Rules. Select the most appropriate option to complete the above sentence.
The figures I, II, and III are parts of a sequence. Which one of the following options comes next in the sequence at IV?
