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Birthstone for October. Tourmaline is the modern birthstone for October.. The gem comes in a range of colors, such as pink, red, green, blue, violet and black. This is fitting since tourmaline's ...
In 1912, to standardize birthstones, the (American) National Association of Jewelers (now called Jewelers of America) met in Kansas and officially adopted a list. [1]: 317 The Jewelry Industry Council of America updated the list in 1952 [3]: 311 by adding Alexandrite for June, citrine for November and pink tourmaline for October.
The pink color of tourmalines from many localities is the result of prolonged natural irradiation. During their growth, these tourmaline crystals incorporated Mn 2+ and were initially very pale. Due to natural gamma ray exposure from radioactive decay of 40 K in their granitic environment, gradual formation of Mn 3+ ions occurs, which is ...
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OPAL (25D: Milky white birthstone) OPAL is the birthstone for people born in October. TESS (34D: Mystery writer Gerritsen) TESS Gerritsen is an author and a retired physician.
Taaffeite (/ ˈ t ɑː f aɪ t /; BeMgAl 4 O 8) is a mineral, named after its discoverer Richard Taaffe (1898–1967) who found the first sample, a cut and polished gem, in October 1945 in a jeweler's shop in Dublin, Ireland. [4] [5] As such, it is the only gemstone to have been initially identified from a faceted stone.
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