This unusual specimen is comprised of tabular cerussite crystals which have been altered to pale blue, leadhillite. I have NEVER seen the like! This is a very rare piece! Sitting in a vug is a composite unaltered leadhillite crystal which is lustrous and which exhibits the most beautiful pastel blue color. The unaltered crystal measures 1.0cm across and pseudos measure up to 3.0 cm across (some with minor edge damage). It is a beautiful piece overall. This deposit, over its history, has produced many surprising secondary specimens like this one.