If the weight is given in decimal parts of a carat, the figure should be accurate to the last decimal place. One type of treatment fracture filling conceals cracks in diamonds by filling them with a foreign substance. If diamond weight is stated as fractional parts of a carat, the retailer should disclose two things that the weight is not exact dynafluxindia.com, and the reasonable range of weight for each fraction or the weight tolerance being used. rubberfacesagency.co.uk http://www.rubberfacesagency.co.uk/links/Shopping-Jewellery.html