Gabbro: refers to a large group of dark, coarse-grained, intrusive mafic igneous rock chemically equivalent to Basalt. Because of its special hardness and strength, chemical and physical properties, Gabbro is a very suitable material for a wide range of construction and engineering projects.
  Aggregate  0-5 mm, 5-10mm, 10-20 mm, 20-25 mm, 20-32mm, 20-37.5mm, 20-42 mm