PINK TOURMALINE QUARTZ ROUGH
An awesome Pink Tourmaline Quartz Rough. This chunk of Quartz is full of deep pink Tourmaline crystals. The pink and white are a great contrast. This is a sturdy specimen and a good hand sized rock. It is extra quality Tourmaline and a very collectable piece for the mineral and crystal enthusiast.
11.3cm x 4cm x 3.4cm, 174g.
The Tourmaline Group has a general formula of AX3Y6(BO3)3 Si6O18(O, OH, F)4. The A can be either calcium or sodium. The X can be either aluminum, iron, lithium or magnesium. The Y is usually aluminum, but can also be chromium or iron.
There are many unique properties of tourmalines. They are piezoelectric which means that when a crystal is heated or compressed (or vibrated) a different electrical charge will form at opposite ends of the crystal (an electrical potential). Conversely if an electrical potential is applied to the crystal, it will vibrate. Secondly they are pleochroic which means that the crystal will look darker in color when viewed down the long axis of the crystal than when viewed from the side. This property goes beyond the idea that the crystal is just thicker in that direction. Even equally dimensioned crystals will demonstrate this trait.