Lapis-Lazuli' is a blue coloured precious stone. It is mineral of the class

Options

A. Ferrous sulphate
B. Copper sulphate
C. Sodium alumino silicate
D. Zinc sulpate

Answer

To determine the class of the mineral to which Lapis Lazuli belongs, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Composition of Lapis Lazuli**:
Lapis Lazuli is primarily composed of the mineral lazurite, which is a complex silicate mineral.

2. **Analyze the Options**:
The options given are:
- Ferrous Sulphate
- Copper Sulphate
- Sodium
- Alumino Silicate
- Zinc Sulphate

3. **Determine the Correct Class**:
Among the options, "Alumino Silicate" stands out as it refers to a group of minerals that contain aluminum and silicon, which is consistent with the composition of Lapis Lazuli.

4. **Conclude the Answer**:
Since Lapis Lazuli is classified as a sodium aluminosilicate, we can conclude that the correct answer is "Alumino Silicate".

### Final Answer:
Lapis Lazuli is a mineral of the class **Alumino Silicate**.

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