31-1821-CO-PR-8451-16
Número certificado: 31-1821-CO-PR-8451-16
Especie mineral: Corundum
Fecha certificado: 11-05-2016
Variedad gema: Ruby
Origen: Natural - glass-filled treated
Composición química: Aluminium oxide
Sistema cristalino: Rhombohedral
Hábito cristalino: Hexagonal prism with rombohedral faces
Color: According to GIA GEmSet: slpR 7/3 slightly purplish red, dar,very slightly grayish
Talla: Oval
Medidas: 4.82x2.66x7.20 mm
Peso: 2.34 ct
Brillo: Vitreous
Transparencia: Transparent
Índice refracción: 1.770 - 1.762
Birrefrigencia: 0.008
Signo óptico: -
Dureza: 9 Mohs
Exfoliación: None
Peso esp.: 4.02
Espectro absorción: Due to chromic oxide
Descripción espectro asborción:
Fines lines in red like a doublet at wavelengths 694 and 692 nm. A broad absortion area cutting out the yellow and most of the green, two fine lines in the blue and the violet too being absorbed.
Observaciones:
This gem have been treated with glass fissure filling. Fissure filling material may be unstable to elevated temperatures and to chemical agents. Special care should be taken when cleaning or reparing jewelry items set with fissure filled corundum.
