Alstonite with Calcite, Cumbria, England, Miniature-Sized SpecimenApprox. Dimensions: 1. 8 in x 1 in x . 4 in Approx. Weight: 14 grams Radiating spikes of Alstonite rest on a bed of Calcite in a flowery formation in this combined specimen. The pink of the Alstonite stands out against the white of the Calcite upon which it rests. An excellent albeit small specimen of a rare mineral on a common mineral.