I've never imaged that rose gold could look so beautiful! To find out how they make it I did a short research on Wikipedia and found out that the alloy
Recently LG and HTC have re-release their phones by attaching new colors on them. LG goes white for the Viewty and the HTC goes even deeper with 7 different colors for their Diamond. So, with this new color, LG has pink, hot red and white color for their Viewty besides of the traditional shiny black case. Meanwhile, HTC chose Rose, Purple, White, Blue, Mocca, Red and Yellow color.