Berlinite

"Berlinite (aluminium phosphate, chemical fomula AlPO4) is a phosphate mineral. It has the same crystal structure as quartz with a low temperature polytype isostructural with α–quartz and a high temperature polytype isostructural with β–quartz. Berlinite can vary from colourless to greyish or pale pink and has translucent crystals. It occurs as a rare mineral in high-temperature hydrothermal or metasomatic deposits."

Expert from the Galactic Encyclopedia.

Description
Berlinite is a crystalline mineral, brownish-pink in color. It has an average hardness, making it easy to mine with standard mining tools. Although a rare substance on Earth, it is rather quite common everywhere else in the galaxy (the reason for such an anomaly currently unknown), making it an important source of both aluminum and phosphorus.

Where to Look for It
Berlinite deposits can be found on almost any planetary biome, though it is far more common on planets with high levels of volcanic or hydrothermal activity. Because of this, most berlinite deposits are found underground, often well below the surface biome layer.