03/04/2013
12) This sapphire is in my top ten - most notable stones. It is very hard to describe this stone, some would say it's a color change sapphire and they would be WRONG. Color changers change the entire color of the stone depending on the light they are viewed under. This stone is always a pale yellow regardless of the wavelength of the light, instead it has an internal 'ring' localized in the plane of the girdle, and is only seen under bright lights (incandescent or fluorescent) as a bright blue fluorescing ring which is almost discernible in the 2nd pic from the right, that's the appearance of this stone under direct bright light, indirect lighting appears like the far left photo, and in subdued lighting it appears like the 2nd from the left and is sometimes seen as completely yellow as in the far right picture, which for these photos the only way I could capture that color was to shoot it with the pavillon up. This sapphire came from Africa, region unknown, it is untreated and clean. It weighs 0.49 ct and measures 4.8 mm in width. Due to its rarity and peculiar adularescence it's pricey, $1000. If you are interested in this stone leave a note for me here.