... used in fireglass or marble 3.10 years experience hot sell dark blue glass rocks for decoration Glass Rock.Glass Stone.Fireplace ... 3.Products Specification Colors AvailableClear,White,Red,Yellow,Blue,Green,Black,Amber,Ocean blue,Light grey,Light purple,Dark purple etc.Regular ... -4.00mm.Other size is available as per requirement. hot sell dark blue glass rocks for decoration