75055 is a medium-grained ilmenite basalt that appears to be quite similar to some of the Apollo 11 basalt samples. It has a coarse-grained subophitic texture with tabular plagioclase (0.05 to 2 mm) intergrown with subhedral to anhedral pyroxene (0.05 to 0.8 mm) and ilmenite laths (0.4 to 1.4 mm). In addition, the mesostasis between the major minerals contains cristobalite (rotation 1), troilite, metallic iron, ulvospinel, Ca phosphate, baddeleyite and tranquillityite. Olivine is absent.
The sample weighed 949.4 grams before analysis and has been dated at 3.78±0.02 billion years (Ar/Ar).
Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/