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.
Simulated opals can be made of glass or plastic. Synthetic spinels can simulate many stones, as they come in so many colors. And many stones can be simulated by fusing layers of materials together into what are called doublets and triplets. Doublets and triplets can contain the actual gemstone as the top layer, fused to some other material which makes up the bulk of the stone. They require careful examination by a trained eye to detect.