[QUOTE=Squadoosh]
Exactly what I’m trying to find out. I have this idea that some stones (quartz-based like amethyst, maybe?) are picked up as easily as apples from an orchard while others are only mined by slave labour, finely cut and carved by children, and marketed by cartels.
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This depends on the type of gem deposit. Some secondary deposits can be worked relatively easily with hand tools, but I don’t think there is ever any guarantee that a particular variety of stone was gotten that way. But it has been a while since I have read up on this.
[QUOTE=Squadoosh]
but what I’m really looking for is some facts or numbers or articles condemning the anti-human alexandrite industry.
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An article that mentions conflict rubies:
http://www.rutlandherald.com/apps/pbcs.dll/article?AID=/20060430/NEWS/604300327/1031
Accident at tanzanite mine:
Article about emeralds (warning! lots of science!):
http://www.newscientist.com/article.ns?id=dn4568
Also, many people have mentioned synthetic stones. Synthethic rubies, sapphires and many other stones are readily available. Sometimes these are called “lab created” or just “created” (these terms should all mean the same thing, but it is always best to read the fine print). If you do a search for “synthetic ruby rings” or “lab created sapphire jewelry” etc. you should turn up lots of options.
As others have noted, these are structurally and chemically the same as natural stones, and generally more durable because they do not have flaws or inclusions, but the colors are often very bright, and they can have that sort of “candy” quality to them, so you may want to look at some in person before you buy. Many department store and mall jewelers carry synthetics these days.
Also, some stones that are called synthetics (often emerald) are not genuine synthetics, but are other synthetic stones that are made to mimic the colors of the natural stones. Synthetic corundum (ruby and sapphire) and spinel are commonly used. If it is important to you, it is a good idea to shop through a reliable source and ask questions. The terms are sometimes abused.
I know this is more info than you asked for, but perhaps someone will find it helpful. 