The principle lead ore found in the mineral veins of the Yorkshire Dales. This mineral has a specific gravity of 7.3 - 7.6 which makes it much heavier than the other minerals present in the veins. Ore dressing techniques exploit this property to separate the ore from other minerals.

A common mineral known for its rhomboidal crystals. Found in a variety of colours, rarely clear.

This mineral has been worked for decorative pebbledashing.

Also known as heavy spar due to its specific gravity, which ranges from 4.3 - 4.6. This mineral is present in many mineral veins but had no commercial value until the late 19th century.
Used as a filler in paints, paper and synthetic rubber products. It is also used in ceramic glazes and enamels.

It has been claimed that there is more of this mineral in Swaledale and the North Pennines than the rest of the world. Witherite is an important source of Barium after Barytes.

Common in the veins around Greenhow Hill this mineral is used as a flux in steel making, for the manufacture of hydrofluoric acid and in the glass industry. When exposed to ultraviolet light fluorspar will often fluoresce, hence its name. This is rarely the case with fluorspar found in Yorkshire, but right are two specimens from the North Pennines. Place your cursor over the image to see them fluoresce.