Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. A gemstone associated with a particular month and customarily worn by persons born during that month.
Wiktionary
- n. Any of twelve gemstones traditionally associated with the month of one's birth
- n. Any of a similar list of less costly substitutes
Examples
“In fact, March and April aren't that exciting either so those could be two weeks, too, except that it greatly shortens the chances that your birthstone will be a diamond.”
“My gaze shifted to Mr. March, who sat at the head of the table with his elbows on the table, his hands clasped together, and I noticed his striking gold pinkie ring with a lapis, which I would find out later was his birthstone.”
“I like jewelry – in fact, one of my most cherished possessions is a tiny birthstone ring my uncle bought for me on my 6th birthday.”
“My birthstone was emerald, I told him so, and his chlorinated eyes said, "Well, that makes you NOT simpleminded.”
“ I can see the bits of light blue cotton candy in that girl's hair and the official Padres 'insignia on that guy's cap and the little unicorn birthstone pendant around the neck of that old lady who's not playing the game but she's standing back and watching the kid do it, I guess he's her grandson.”
“The brainspawn of a beer firm, and ostensibly aimed at Holland supporters, this clingy minidress would also suit those whose birthstone is orange polyester.”
“The ring was one I'd given him when we first started dating, my birthstone cut in a heart shape.”
The Washington Post: Promises a Marine widow cannot bear to hear
“I still wore the engagement ring Arden had given me around my neck on the chain that used to suspend my little birthstone ring.”
“I tied my little birthstone ring to the string, figuring I could do the same as Mrs. Allismore and predict which stock would be a winner.”
“The only thing left of any value was the tiny birthstone ring I always wore on a chain about my neck and the quartz rose that Arden had given me.”
Lists
These user-created lists contain the word ‘birthstone’.
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set phasers to...
you name the setting
I've tuned mine to be gentler and kinder
following suit is not mandatory but would be appreciatedcoddle, confuse, flummox, tap, furrow, instigate, invigorate, punnify, logical, must... act... be..., bowdlerise, laughing gas and 435 more...
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Five Consecutive Consonants
A list of words containing five consecutive consonants
I do not include words containing "y" as part of the 5-letter string, since that letter invariably functions as a vowel, as in rhythm. <...heartstricken, heartstruck, wellspring, offspring, yachtsman, worthwhile, backstretch, backstroke, downstream, downstroke, breaststroke, birthstone and 188 more...
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Consecutive Consonants
borscht, worthwhile, bronkhurstspruit, latchstring, hirschsprung's di..., backstroke, birthplace, birthstone, breaststroke, corkscrew, downstream, erstwhile and 26 more...
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Things from my memory
nigger baby, mexican jumping bean, puddle jumper, mood ring, pet rock, cat scratch fever, taxman, hippie, vaseline, argyrol, mercurchrome, methiolade and 655 more...
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Just 'cause I like 'em, B
bloviate, bejesus, brouhaha, behoove, bodacious, bamboozle, banshee, bub, bolus, blob, bubbly, bleb and 414 more...
Tweets
Looking for tweets for birthstone.

treeseed Merriam-Webster Dictonary:
noun
Date: 1907
: a gemstone associated symbolically with the month of one's birth Feb 10, 2008