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 a very common material that is found throughout the world. Most of this opal is common opal or potch which has a milky or pearly luster known as opalescence. However, rare specimens of opal produce brilliant color flashes when turned in the light.These color flashes are known as a play-of-color.ome opal does not exhibt a play of color, does not have a base color, and does not have a body color like most common opals. But this material is still opal. The tumbled opals at right are examples of this material. It has been called water opal and hyalite..