A specimen from Moneen Quarry, County Mayo, Ireland, featuring a small vein lined with exposed icy, translucent celestine crystals and associated calcite on limestone matrix. The celestine displays a delicate pale bluish clarity and glassy lustre.
Moneen Quarry is developed in Lower Carboniferous limestone and is known for producing a variety of minerals within small cavities in the rock. These cavities are often associated with fossil-bearing beds containing corals and nautiloid shells, and while they are typically small, they can yield well-crystallized specimens of minerals such as calcite, fluorite, strontianite, and celestine. Specimens such as this represent classic mineralization from this productive Irish limestone quarry.
