Agate is less rare than emeralds but no less ... According to the National Museum of Natural History, "Agates are typically white, grey, and yellowish-brown to reddish-brown, but shades of blue ...
The Blue Agate with White and Sky Blue colorway ... White with Silver Metallic and Reflection,' 'NB Navy with White and Shadow Grey,' and 'Moonbeam with Arid Stone and Black.' ...