Show EXPENSE OF PASTE DIAMONDS material from which im tat on gems are made Is not cheap 0 paste from which imitation precious stones are made Is widely known but few are acquainted alu the ingredients though it Is generally understood that the paste gains ats brilliancy from the lead it formulas lor mulas vary for the paste but all contain rock crystal red lead car bonate of potash borax and white ar it is required that these articles shall be of a higher grade of purita as there is a considerable waste so that the gems made from strass the 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 0 crystal alone that are considerably harder than glass in the making of these a crystal stone is hollowed out and filled with some colored liquid the orifice being closed w ath a plug of crystal which is ground down so that there Is no trace of the junction new tori herald |