Luster refers to the appearance of light that is reflected from the surface of a mineral. Some minerals look 'dull' in luster, and some look 'shiny', for example. Permeability is the ability of a rock or mineral to transmit fluids. It is closely related to porosity, or how much open space is in-between particles of a rock. However, for a rock to be permeable, the pore spaces must be connected so that fluids can move through the rock.
Porosity is the volume of open spaces in a rock.
On the other hand, sandstone, which is formed by individual sand grains compacting together, generally has a high degree of porosity. Specific Gravity refers to how much something weighs in comparison to an equal volume of water. Streak refers to the color that a mineral gives off when it is in powered form. The streak is usually determined by scraping a mineral along a ceramic white plate, known as a 'streak plate'. The streak is considered a much better method of identification of minerals than color.