I may have a printout around of their old product lineup. As I recall, starting from the bottom, there was a model or two below the Topaz, which was the best of x2-construction. The first of the x3 Hyperlitz was the Ruby, which has been replaced by the Coral (there may be internal differences between the Ruby and the Coral, but it's not apparent from the product descriptions). Going up in price, there was the Quartz, Lapis, and Diamond. Not sure this is helping you much - I'll try to find my old printout and post it here for you and others.
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