Show EXPENSE OF PASTE DIAMONDS Material from Which Imitation Gems Are Made Is Not Cheap Paste from which imitation precious stones aro Dade is widely known but few aro acquainted with the ingredients though it is generally understood that the paste gains Its brilliancy from the lead it contains Formulas vary for the paste but all contain rock crystal red lead carbonate car-bonate ot potash borax and whito arsenic ar-senic It Is required that these articles shall bo of a higher grade of purity as there is a considerable waste so that tho gems made from strass as tho composition Is technically known are by no means Inexpensive A paste diamond cannot scratch glass and is thus easily detected but colored stones are made of crystal alono that are considerably harder than class In the making of theso a crystal stono is hollowed out and filled with some colored liquid tho orifice being closed with a plug of crystal which Is ground down so that there Is no trace of the Junction New York Herald |