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.
1 The gemstone is graded on color intensity, hue and tone. 2  The most valuable are intense and pure blue with a tinge of violet and very little gray or green hues. 3  Ceylon Blue, Cornflower Blue, Electric Blue, Kashmir Blue (from Kashmir), Royal Blue, Sky Blue, Velvet Blue and Violet Blue are sapphire colors.