THIS IS A VERY RARE SAPPHIRE. IT IS A NICE SOFT POWDER BLUE COLOR AND IT HAS A PEFECT TRIANGLE INSIDE THE STONE. THE TRIANGLE IS NATURAL SILK IN A STRANGE PATTERN. IF THE SAPPHIRE IS TURNED JUST RIGHT THE TRIANGLE CAN BE SEEN LIKE A WINDOW. IT IS A ONE OF A KIND AND IS A GREAT COLLECTOR OR IT COULD BE MADE INTO A VERY NEET RING. THIS IS ONE OF THE FEW TIMES WHEN SILK IS A IMPROVMENT OF A STONE. A SAPPHIRE WITH A WINDOW IS VERY LUCKY IF YOU ASK ME. WOW
DISCRIPTION

TYPE: SAPPHIRE
CUT: OVAL
COLOR: POWDER BLUE
WEIGHT: 1.69ct.
SIZE: 7.7mm. X 6.3mm.
CLARITY‎: VS2
LUSTER: EXCELLENT
TREATMENT: NONE
ORIGIN: MONTANA ( ELDORADO BAR MINE )
HARDNESS: 9