Arthur, is it that the stones in the ruby necklace show as pink in the photographs because they are a blue based red? Or is it because of the lighting in the display cabinet and the venue? Because you mentioned the sparkle of this necklace, I also wondered if these stones might be spinels and not rubies. Some spinels show wonderful colours in the blue-red to pink range and good spinels have a degree of sparkle not seen in rubies. However, I have no doubt if a reputable jeweller is selling an item as a ruby necklace, the stones will be rubies, as the differences are obvious to a gemologist examining stones. Did you see anything indicated by the jeweller that these stones are rubies? If they are rubies, the colour might indicate where they came from.