The study suggested that a mother's diet as an adult had no effect on her baby's birth weight. Far more important were the mother's health and nutrition as a baby and toddler, and even the grandmother's diet when she was pregnant with the baby's mother.
Synthetic Opal: is created in a Lab, but itsâ properties, chemical, optical and physical, are identical to that of a naturally occurring Opal. Simulated Opal: is also created in a Lab, and is optically identical to natural Opal, but does not have the same physical and chemical characteristics. One of the biggest distinctions, and subject of debate for classification, is what is used in place of water in the Lab Created Opals. The originator of the Synthetic Opal, Pierre Gilson Sr., uses pure silica to fill the gaps between the Opal spheres. Thus creating a product that is 100% Opal.
Opal is one of the world's most beautiful and precious gemstones, predominantly found in Australia. It is one of only six types of precious gemstones found on planet earth, sharing prestigious company with diamonds, rubies, sapphires, emeralds, and pearls. Over 95% of the world's precious opal comes from Australia, and opal is Australia's national gemstone. While several different types of opal are present in nature, there are two main varieties-precious opal and common opal or potch. Precious opals exhibit the characteristic play-of-colour, and is comparatively rare. Opal which is dull and valueless is called common opal. Common opal occurs in abundance throughout the world. Common opal and potch do not exhibit a play of colour.