- tournachon, gaspard-félix,
Origin of tourmaline
Examples from the Web for tourmaline
The dichroism of tourmaline is stronger than that of ruby and more obvious to the unaided eye.
Connecticut green tourmaline tends more to the dark yellowish green, and Ceylon tourmaline to the olive green.
The tourmaline in section is brown, green, blue or colourless, and often the same crystal shows many different tints.
It is true, others before him had noted that substances like tourmaline possessed electrical properties.Catholic Churchmen in Science|James J. Walsh
The phenomenon was first observed in crystals of tourmaline, the principal axis of which is a uniterminal triad axis of symmetry.
Word Origin for tourmaline
complete silicate of aluminum and boron, 1759, ultimately from Sinhalese toramalli, a general name for cornelian.