Many cuts of beef now meet the USDA's regulations to qualify as lean or extra lean. 1  Of these, the following are considered extra lean: 2  Eye of round roast and steak. 3  Sirloin tip side steak. 4  Top round roast and steak. 5  Bottom round roast and steak. 6  Top sirloin steak.
Some varieties of Limestone are more porous than others. In general, limestone countertops are porous and vulnerable to stains. Water and soap spills need to be wiped right to prevent staining.Acid substances such as vinegar, lemon juice and ammonia will cause surface discoloration and etching.n general, limestone countertops are porous and vulnerable to stains. Water and soap spills need to be wiped right to prevent staining. Acid substances such as vinegar, lemon juice and ammonia will cause surface discoloration and etching.
Limestone has numerous uses: as a building material, as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints, and as a chemical feedstock.cid-based cleaning chemicals can also etch limestone, which should only be cleaned with a neutral or mild alkaline-based cleaner. Other uses include: 1  It is the raw material for the manufacture of quicklime (calcium oxide), slaked lime (calcium hydroxide), cement and mortar.