This crystal silicone sphere was refined so well that it is described as the most perfect sphere in the world. It has been stated that if this sphere were blown up to the size of the earth that the tallest mountain on it would only be eight feet high. It is also the new standard for the comparison weight of one kilogram (this being measured by the number of atoms it is composed of). Wow... if you are into scientific technical reading (and who isn't) click on this link for more info www.csiro.au/science/ps35k.html .
