Что такое облагораживание бриллианта заполнением трещин и полостей стеклом?

Diamonds with low clarity performances are treated by filling the cavity crack with high refractive glasses in order to visually improve the clarity. This type of treatment is irreversible and visually diagnosed.
The advantages of stones treated this way are relatively low price at considerable sizes.
The disadvantage is the fact that such stones cannot be cleaned in ultrasonic washing as well as washing in corrosive environments (acids, strong alkalis). Also stones filled with glass should not be exposed to long-term exposure to ultraviolet radiation of high intensity since there is a possibility of haziness of the glass in the cracks.