CBC Marketplace website summarizes the show and provides other comments on the topic. They link to this page, and provide some useful additional information on moissanite. Twenty years ago, when cubic zirconia hit the market, there was general concern, but techniques were quickly developed to ease identification. Soon a knowledgable gemmologist could spot CZ from some distance away although, in fact, it is a better looking diamond simulant than moissanite. Moissanite is a more sophisticated simulant, but it too can be readily identified by very simple means.
Education is the answer.
Moissanite identification information. CBC Marketplace moissanite info . In January 1999 Toronto received more than 100cm of snow in two weeks, and seven pieces of synthetic moissanite. However, late in the year, the stuff is still showing up and bad guys are still making money on the greedy and the gullible. Melee goods are showing up mixed with diamonds in cluster rings.