Platinum is popular choice for jewelry today. It is rarer than gold and one of the strongest metals. Because of it's superior strength most of world's famous diamonds , including "The Hope Diamond" are set in platinum. It's hypoallergenic and usually 95% pure, a great choice for people with sensitive skin. It has a strong steely-white color that accents diamonds to their fullest sparkle. Platinum is usually stamped Plat, 900Pt or 950 Plat.