This entry is for three different samples of opaque prismatic crystals. The smallest one is the representative. The two other samples include a one attached to a piece of (likely) Quartz and the joint of a pair of contact twins which are accompanied by some (possible) Muscovite and Quartz. All of these samples are opaque and mostly white with some orange and brown associated. They also all have flecks of silver in them. Notable for ID: The original identification as Spodumene was assumed to be correct. Due to the difference in hardness and specific gravity it was labelled as a pseudomorph. Cymatolite was chosen because of extant samples from Chesterfield. It is possible that the pseudomorph is in fact something different (perhaps Illite or some sort of clay).