Big gems are getting rarer, it would have been very easy to find a dozen large topaz gem stones a decade ago. But it is not so today, high quality topaz gems in big sizes are becoming increasingly harder to find. The video shows a rare big swiss blue topaz gemstone that weighs over 30 carats. The more interesting thing is that this big gem is eye clean and perfectly cut by some of the world's finest craftsmen. You can look at some design suggestions for a pendant made with this gem stone here: http://www.kaisilver.com/pendnt03.htm