Hundreds and hundreds of years ago, the treatment of gemstones has existed. Currently, many of the treatments are still being used. Treatments of the gemstones bring some Broadway changes in the gemstone itself or in clarity.
Ruby Gemstone is heated at a very high temperature to change its appearance.
Surface diffusion Heating:
At a very temperature in presence of coloring agents for allowing chemicals to penetrate into the stone.
Stones are filled with epoxy resin or glass OR lead glass to conceal the fractures.
Any work done on the stones damages the internal structure of the gemstones.
Hardness & Toughness Of Ruby Gemstone
Hardness: (resistance to scratching) 9 on the Moths scale
Toughness: (resistance to breaking and chipping) usually excellent, but large fractures can lessen the durability
Stability (Resistance to Heat and Chemicals)
Heat Heat can cause changes in color or clarity, it can also damage fracture filling.
Light Fracture filling may dry out or alter under intense light
Chemicals Can harm the fillings in fracture filled stones