Opal is considered the birthstone for people born in October. Famous opals. The Olympic Australis, the world's largest and most valuable gem opal [citation needed], found in Coober Pedy; The Andamooka Opal, presented to Queen Elizabeth II, also known as the Queen's Opal
1 Carbohydrates â are required for energy. 2  Glucose, which is a monosaccharide, is the most essential source of energy in the body. 3  The brain works entirely on glucose alone. 4  When an immediate source of energy is required, glucose is converted into glycogen which is stored in the liver.
Carbohydrates are one of the most important nutrients needed in an athleteâs diet. Carbohydrates are vital to help reach peak performance during physical activity because they provide: ï· Energy: Carbohydrates are the main source of energy for our brains and bodies to function properly.arbohydrates are one of the most important nutrients needed in an athleteâs diet. Carbohydrates are vital to help reach peak performance during physical activity because they provide: ï· Energy: Carbohydrates are the main source of energy for our brains and bodies to function properly.