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tanzanite


A blue or violet gem variety of zoisite, containing vanadium


Tanzanite is the blue/purple variety of the mineral zoisite which was discovered in the Meralani (Merelani) Hills of Northern Tanzania in 1967, near the city of Arusha. It is used as a gemstone.


A deep blue-violet variety of zoisite.


A variety of zoisite that has naturally occurring shades of blue, green, yellow, pink, brown and khaki but virtually all gemstone quality crystals are heat treated to produce the highly valued shades of sapphire blue, amethyst and blue violet. On Mohs' scale of hardness, tanzanite is 6.5-7.

rings


Each of a series of resonant or vibrating sounds signaling an incoming telephone call


(ring) sound loudly and sonorously; "the bells rang"


(ring) a characteristic sound; "it has the ring of sincerity"


An act of causing a bell to sound, or the resonant sound caused by this


gymnastic apparatus consisting of a pair of heavy metal circles (usually covered with leather) suspended by ropes; used for gymnastic exercises; "the rings require a strong upper body"


A telephone call

blue


Blue color or pigment


A blue uniform, or a person wearing a blue uniform, such as a police officer or a baseball umpire


Blue clothes or material


blue color or pigment; resembling the color of the clear sky in the daytime; "he had eyes of bright blue"


turn blue


of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky; "October's bright blue weather"- Helen Hunt Jackson; "a blue flame"; "blue haze of tobacco smoke"