Creatinine is a normal waste product produced by muscle metabolism. When your kidneys are functioning normally, they filter creatinine and other waste products out of your blood and send them out of the body through urine. A creatinine urine test measures the amount of creatinine in your urine and can help your doctor evaluate how well your kidneys filter waste. This is useful in diagnosing or ruling out kidney diseases and some other conditions.
These terms are based on old traditions from the west. These days, all gemstones are considered precious since they are all rare and there is a limited supply of them. The traditional list of gemstones that are considered precious stones are: Diamond.
Stones are normally classified into two categories, precious stones and semi-precious stones. The value of a stone is gauged on these types. Many collectors prefer the rare to the beautiful. The precious stones are the emeralds, diamonds, sapphires, and rubies.eparating precious stones into these types of groups helps to identify their composition, their color, and their origin. They also have a refractive index, dispersion, specific gravity, hardness, cleavage, fracture, and luster. Each of these features is important when assessing the value of the stone. Ad.