The specific gravity of quartzite varies depending on the specific mineral composition and porosity of the rock. However, it generally falls within the range of 2.6 to 2.7.

Here's a breakdown:

* Average Specific Gravity: 2.65

* Typical Range: 2.6 to 2.7

* Possible Variations:

* Higher specific gravity can occur if the quartzite contains a higher proportion of dense minerals like iron oxides.

* Lower specific gravity might be observed in quartzite with higher porosity or presence of lighter minerals.

It's important to note that these are general ranges and the actual specific gravity of a particular quartzite sample should be determined through laboratory testing.