A Geoscience Digital Image Library

TitleBlue Tourmaline with quartz and cleavlandite
DescriptionBlue Tourmaline is a member of the group tourmaline. Tourmaline derives its name from the Singalese word tourmali, which means mixed stones. Tourmalines have the basic chemical formula of AX3Y6(BO3)3Si6O18(O,OH,F)4. Tourmalines have many unique properties such as they are piezoelectric which means that when a crystal is heated, 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. They are also pleochroic. This sample is approximately 5 cm.
LocationUSA ▹ Maine. Near Newry.
PhotographerShannon Heinle. 2001-11-27.
CollectionUniversity of North Dakota Mineralogy Collection #1723.
Key wordsblue tourmaline, tourmaline,
Tech details392 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera.
GeoDIL number1850