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.
gemstone - a crystalline rock that can be cut and polished for jewelry; he had the gem set in a ring for his wife; she had jewels made of all the rarest stones. gem, stone. jewellery, jewelry - an adornment (as a bracelet or ring or necklace) made of precious metals and set with gems (or imitation gems)