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.
The red color of the ruby is incomparable: warm and fiery. This gemstone has excellent hardness, durability, luster, and rarity too. Grossularite: Grossularite is generally olive green, but there are also yellow, red, brown and violet varieties.
An introduction to crystal chemistry helps in understanding what gems are made of and how this affects gemstone environments and associations. Most gemstones are minerals, inorganic crystal treasures found in the natural world. Some gemstones are not minerals but are organically derived, such as amber and jet. Inorganic gems are crystalline, while organic gems are non-crystalline so described as amorphous, or without the crystalline form.