Natthaphol Chomsaeng
Faculty of Gems, Burapha University, Chanthaburi Campus
Abstract
The filling-glass for fission surface of ruby has been studied. The ruby mixed with filled-glass power was treated in electric furnace at 1000 °C for 1, 3 and 5 hours. The physical properties of as-receive and treated samples were determined reflective index (RI) and specific gravity (SG). Fission and inclusion of all samples were observed by optical microscope. Moreover, UV-visible spectrophotometer was used to determine the reflective index in samples. The result reveals that RI and SG of treated sample were decreased because of low RI and SG of filled-glass. The result shows that the fission surface on ruby was filled by glass and made clear surface. Moreover, the reflection in range 350-750 nm reveal that the reflection value of was not changed in Cr3+ given red color.
