You may be interested in reading an earlier report I did on these (it is on my old website, which is archived but not active).
http://www.geocities.com/carni_glass_uk_2000/JesusFake.htmlThe first examples of these iridised candlesticks was about 8 years ago. I purchased one from a (Belgian or Dutch, I forget) seller on eBay; around the same time a friend of ours found a pair of them in the UK (at Newark, if memory serves me right). The seller was from Belgium.
On the early examples, the iridescence flaked off easily and quickly. We assume the candlesticks had been cold iridised quite recently. More recent examples have been done better and the new iridescence stays on them a bit longer!