– filling surface-reaching fractures or cavities with a glass , resin , wax or oil to conceal their visibility and to improve the apparent clarity of gem materials , appearance , stability , or in extreme cases — to add to a slight amount of weight to a gem . The filling materials vary from being solids ( a glass ) to liquids ( oils ), and in most cases , they are colorless .
Surface reaching fractures in diamonds can be filled with molten lead glass , lessening the appearance of the fractures .
Ruby – Numerous surface-reaching fractures are filled with a glass to lessen their visibility and make the gem more transparent than it really is .
Emerald – Surface-reaching fractures in emerald are sometimes filled with essential oils , other oils , waxes , and “ artificial resins ”
FRACTURE OR CAVITY FILLING
– filling surface-reaching fractures or cavities with a glass , resin , wax or oil to conceal their visibility and to improve the apparent clarity of gem materials , appearance , stability , or in extreme cases — to add to a slight amount of weight to a gem . The filling materials vary from being solids ( a glass ) to liquids ( oils ), and in most cases , they are colorless .
Surface reaching fractures in diamonds can be filled with molten lead glass , lessening the appearance of the fractures .
Ruby – Numerous surface-reaching fractures are filled with a glass to lessen their visibility and make the gem more transparent than it really is .
Emerald – Surface-reaching fractures in emerald are sometimes filled with essential oils , other oils , waxes , and “ artificial resins ”