bblb:
Lita, from clicking on your Wilkipedia link I have learnt something interesting - that America has a different 'official' set of birthstones to the UK! The birthstones I have listed match the list created by the National Association of Goldsmiths of Great Britain in 1937 (see jewellers-online.org). I felt I would need to know rather a lot about semi-precious materials before I could seriously trade in them, so for that reason I have for the moment limited what I have on offer to the twelve birthstones. With time I would love to increase my knowledge, and/or find trustworthy sources, and be able to offer more of what are frequently, absolutely stunning beads.
Best wishes,
Anna
Anna,
::putting on my jeweler's wife hat::
There are actually several different "correct" birthstone lists. I have a couple of them in the store. The traditional or genuine stone list is (in order from January to December) Garnet, Amethyst, Aquamarine, Diamond, Emerald, Pearl or Alexandrite, Ruby, Peridot, Sapphire, Opal or Tourmaline, Topaz and Turquoise or Blue Topaz. Another list substitutes White Sapphire for Diamond, Green Spinel for Emerald, Alexandrite for Pearl, Rose Zircon for Opal, Golden Sapphire for Topaz and Blue Zircon for Turquoise.
Swarovski has its own lists - with several suggestions for some of the months, such as Lt. Rose instead of Opal for October and Lt. Amethyst instead of Pearl or Alexandrite for June.
If nothing else, your list gave some options that the Yanks wouldn't think about. I go through the same thing all the time with my customers. It's surprising how many don't know their own birthstone, anyway. If there are less expensive alternatives to diamond$, I know there are many of my customers who would go for it!
Deb