It measures about a total of 7 .5 carat total weight and measures 16 and is highly polished. 10 mm x 11. 48 mm. Available in a sea blue color, this type of screw adds more elegance to the applications it will be used on. Most notably, this gemstone has not been treated in any way so it preserves its natural and serene look, moreover, it is an authentic gemstone. It has Middle Eastern roots from Iran and shows the modern making and geological background of the country. Due to its weight, size and bright color it is a very special and extremely valuable book. It can be used to produce fine jewelry or as an item that would be considered as a collector’s piece due to its flowing appearance and the fact that it has not been treated in any way.