A few substances are given below:
Graphite lamp black, coke, coal, fullerene, sugar charcoal, wood charcoal, diamond
The total number of crystalline forms of carbon among the given substances is __________ .

Explanation

To determine the total number of crystalline forms of carbon among the given substances, we will analyze each substance listed in the question.

1. **Graphite**: Graphite is a well-known crystalline form of carbon. It has a layered structure where carbon atoms are arranged in sheets, making it a crystalline allotrope.

2. **Lamp Black**: Lamp black is an amorphous form of carbon and does not have a crystalline structure. Therefore, it does not count as a crystalline form.

3. **Coke**: Coke is also an amorphous form of carbon, primarily used as a fuel and reducing agent in metallurgical processes. It does not have a crystalline structure.

4. **Coal**: Coal is a complex mixture of carbon and other elements and is primarily amorphous. It does not qualify as a crystalline form.

5. **Fullerene**: Fullerenes, such as C60, have a unique molecular structure but are not classified as crystalline in the same sense as graphite or diamond. They do not form a crystal lattice.

6. **Sugar Charcoal**: Sugar charcoal is an amorphous carbon produced by the pyrolysis of sugar. It does not have a crystalline structure.

7. **Wood Charcoal**: Wood charcoal is also an amorphous form of carbon and does not have a crystalline structure.

8. **Diamond**: Diamond is another well-known crystalline form of carbon. It has a tetrahedral structure where each carbon atom is bonded to four other carbon atoms, forming a crystal lattice.

Now, summarizing the crystalline forms of carbon from the substances listed:
- Crystalline forms: **Graphite** and **Diamond**.
- Non-crystalline forms: **Lamp Black**, **Coke**, **Coal**, **Fullerene**, **Sugar Charcoal**, **Wood Charcoal**.

Thus, the total number of crystalline forms of carbon among the given substances is **2** (Graphite and Diamond).

### Final Answer:
The total number of crystalline forms of carbon among the given substances is **2**.