Tourmaline is one of the most chemically complicated of all Silicate minerals. It is a complex Silicate of Aluminum and Boron and the composition varies widely with Sodium, Calcium, Iron, Magnesium, Lithium and many other elements that enter into it’s structure. It can occur in a long, slender needle-like crystal to a thick prismatic and columnar crystal to a radial like daisy formation. It comes in many colors usually black and brown (iron rich); brown and yellow (magnesium rich); and blue, red, green, yellow, and pink (lithium rich). This mineral is found in igneous rocks, like Granite Pegmatite, and metamorphic rocks such as Schist and Marble.
Fluorite, also referred to as fluor-spar, is a mineral composed of Calcium Fluoride. It is a widely occurring mineral found world wide and is often found with metallic minerals such as Galena, Sphalerite, Barite, Quartz and Calcite. Fluorite may fluoresce strongly in ultraviolet light which may be due to the presence of some impurities such as Yttrium. Blue is the most common color but red, purple, green, yellow and white are also frequent. It can be used in high performance telescopes, camera lens, enamels and in the making of opalescent glass.
Apatite is a part of the phosphate group of minerals that was formed in igneous rocks and in metamorphosed limestone. Apatite is translucent or transparent and usually green in color but can be colorless, white, yellow, bluish, reddish, brown or purple.