Apatite, Angelite, Fluorite, Peridot and Prehnite Beads
Apatite ... or the mineral that speaks to the bones. Apatite is a group of calcium phosphate minerals subdivided in three series, depending its components. One of them and in a modified form, namely hydroxyapatite, makes up to 70 % of the weight of human bones. Most of the gemstones though are fluorapatite, which has the particularity to define the hardness 5 on the Mohs' scale.
Shimmering blue apatite, also known as cat's eye apatite, is quite unusual in jewelry application. Apatite is considered a stone of motivation that helps to focus as well with problem solving and as with public speaking.
From translucent to semi-transparent ... with a vitreous to pearly luster ... prehnite exists in green, yellow, blue and grey-white colours. It seems to be the first mineral that received its name after a human being, in this case after the governor of the Cape of Good Hope, the Dutch Lieutenant-Colonel Hendrik Van Prehn (1733-1785). The green version is linked to the heart chakra.