Black Galaxy is a combination of mostly natural quartz and/or feldspar, as with most natural granite. Other substances may be present, although the primary minerals are those mentioned.
The minerals in a Star Galaxy Granite slab give it certain characteristics that entice people to buy it. Some of these qualities translate into useful properties for day-to-day use and maintenance.
For example, the presence of quartz makes black granite resistant to both staining and heat. You can place hot pots
and pans on a countertop without damaging the surface.