I noticed that Tiffany still makes the Sparklers necklace in Praseolite but the ring and earrings are now in green quartz. I have the earrings and necklace and eventually wanted to get the ring but now am wondering if it will match, it looks a little greener in the picture. Does anyone know the reason for the switch? Is one stone more valuable than the other? The prices are the same. Thanks for any info.