. >> how do they become -- they're redstone, to begin with? redstones, what is fascinating about them is actually we're not exactly sure what causes them to be red. it's said that it might have to do with some sort of structural anomaly within the rough stone, but nothing has ever been proven. >> so what is the price, for example, this ring right now? >> well, the collection collectively is priced upwards of $15.million. >> okay. what other stones have you brought us? you've got red diamonds and other colors here. >> yeah, we wanted to bring a sampling of what it is that we do so special at la vive. we bought a nice selection of almost ever color. yellow diamond necklace. >> that is gorgeous. this is how many carats? >> 42 carats intense yellow diamonds. which means it has a really strong color saturation of yellow within the stone. >> and then how many diamonds are around the necklace? >> 75 diamonds totalling 72 carats of white diamonds. >> what's the price of that necklace? >> just about $4 million. >> $4 million for that necklace. and agai