Stop reading if I am wrong, or keep going to find out why I am right. Any physicist worth their white coat will tell you that red is the color with the longest wavelength of visible light. In plain English, this means it's the easiest color for your eyes to see, which is why you always notice it first. So any red will catch your eye, but it takes something special to get your full attention.
And if this pendant caught your eye on the page, just imagine how much attention it will attract on your neck. Made with Swarovski ruby rivoli embraced in silver galvanized beads. Even though it is man created crystal it has the tendency to create sparks.