Titanite is a calcium titanium silicate mineral with the formula of CaTiSiO5. Rare earth elements such as thorium, cerium, and yttrium are sometimes present in Titanite in minor quantities.
Celestine is a strontium sulfate mineral with the formula SrSO4. Celestine is an attractive mineral that forms in well-shaped crystals with a distinctive soft blue color.
Apatite is the name of a group of phosphate minerals with similar chemical compositions and physical properties. The primary Apatite group includes Fluorapatite, Chlorapatite, and Hydroxylapatite.
