It's impossible to give a single, definitive specific gravity for garnet schist. Here's why:

* Schist is a metamorphic rock: Its composition can vary widely depending on the original rock type and the metamorphic conditions it experienced.

* Garnet is a variable mineral: Garnet itself has different varieties (almandine, pyrope, etc.) with slightly different densities.

* The amount of garnet in the schist matters: Schist can have varying amounts of garnet.

Therefore, the specific gravity of garnet schist can range from roughly 2.7 to 3.5.

To determine the precise specific gravity of a specific garnet schist sample, you would need to:

1. Analyze the sample: Identify the specific garnet variety and other minerals present.

2. Measure the density: This can be done using methods like water displacement or a pycnometer.

Let me know if you have a specific garnet schist sample you'd like to explore further!