Online dictionaryOnline dictionary
Synonyms, antonyms, pronunciation

  Home
English Dictionary      examples: 'day', 'get rid of', 'New York Bay'




Tourmaline   Listen
noun
Tourmaline  n.  (Written also turmaline)  (Min.) A mineral occurring usually in three-sided or six-sided prisms terminated by rhombohedral or scalenohedral planes. Black tourmaline (schorl) is the most common variety, but there are also other varieties, as the blue (indicolite), red (rubellite), also green, brown, and white. The red and green varieties when transparent are valued as jewels. Note: Crystals of tourmaline when heated exhibit electric polarity (see Pyroelectric, n.). Tourmaline is also used in the form of a polariscope called tourmaline tongs.






Collaborative International Dictionary of English 0.48








Advanced search
     Find words:
Starting with
Ending with
Containing
Matching a pattern  

Synonyms
Antonyms
Quotes
Words linked to  

only single words



Share |
Add this dictionary
to your browser search bar





"Tourmaline" Quotes from Famous Books



... wave-lengths, he succeeded in demonstrating that the electric waves are polarised by the crystal Nemalite (which he himself discovered) in the very same way as a beam of light is polarised by the crystal Tourmaline. He then showed that a large number of substances, which are opaque to Light (e.g. pitch, coal-tar etc.) are transparent to Electric Waves. He next determined the Index of Refraction of various substances for invisible Electric Radiation ...
— Sir Jagadis Chunder Bose - His Life and Speeches • Sir Jagadis Chunder Bose

... "This is getting interesting." "You needn't laugh. I assure you that men know more about those things than they're usually given credit for. Your jewels fit in with the whole idea, too. That jade pin, for instance, and your tourmaline necklace, and your ruby ring, and the topazes you wear with yellow, and the faint scent of roses that always ...
— Old Rose and Silver • Myrtle Reed

... a few simple experiments to amuse her—made crystal trees, a shower of snow, a heavy stone out of two empty-looking bottles, spilt mercury and set her to gather it up again, showed her prisms, and made her look through a bit of tourmaline, and in every way conceivable to him strewed the path of learning with flowers—then she began to feel a little interest in the place and left off making wry faces at the dirt and ...
— Lippincott's Magazine of Popular Literature and Science, Vol. 17, - No. 97, January, 1876 • Various



Words linked to "Tourmaline" :   mineral, transparent gem, schorl



Copyright © 2024 Dictionary One.com