http://londonbluetopazring.net blue topaz engagement rings, blue topaz earrings, blue topaz engagement ring One popular method is called the London process. If you've ever seen a London blue topaz ring, this is where their gemstones come from. This process involves placing the topaz inside a nuclear reactor. Instead of light radiation, the topaz is hit by high energy neutrons instead. This provides an even deeper blue color which looks absolutely radiant. The downside to this process, though, is that the gems need to sit for about half a year before they're no longer radioactive.
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