I’ve registered with an Australian opal auction site and I’m looking
to buy some affordable solid (NOT doublet or triplet) stones with
good colour play, both as parcels and nice individual stones. I like
the Cooper Pedy opals best. I’ve noticed that one particular seller
has some nice looking parcels in 8x6mm, 7x5mm, 6x4mm ovals, for
example. However, most of his stones are only cut at 1mm thickness,
such that they are merely slivers of opal. Instinct tells me that for
most purposes, this is too thin, especially in an 8x6 or 7x5mm stone.
I’m more inclined to buy stones in that sort of size that are at
least 2mm thick.
Am I right to avoid the 1mm thick stones? Any advice people can
offer with regard to buying opals would be much appreciated, thanks.