Expierience in using speed bright question

hello allany of you who have been useing or have expierience in using
the speed bright sonics, i have been useing mine for a few years now
and works pretty well on most items (Silver)with the ocasional
darkening of the aricle, or dark little spots, which I have leaned to
take care of. this week we hadd a problem with one of the stones, it
was a pair of earings in silver and gold mix, the stones in this
piece are peach moon stones. well the one came out just fine and the
other had turned brown in color from this bright peachy,apricot
color. i was wondering if anyone had expierienced this? and if any
one rmemeberes writting about it ot orchid? my guess is it has
something to do with the electric current going through the peice.
but it is sucha low voltage that i did not think it would make a
difference.I use the turqouise and pearls in the speed bright with no
trouble. should i worry abuot this for my moonstones and fire
opals,opals in general? any ideas?

Hratch Babikian

Hello All, I am re posting this, since it did not get any hits
/answers last posted. I am hoping someone out there will know have
experienced the same as I.

hello allany of you who have been useing or have expierience in
using the speed bright sonics, i have been useing mine for a few
years now and works pretty well on most items (Silver)with the
ocasional darkening of the aricle, or dark little spots, which I
have leaned to take care of. this week we hadd a problem with one
of the stones, it was a pair of earings in silver and gold mix,
the stones in this piece are peach moon stones. well the one came
out just fine and the other had turned brown in color from this
bright peachy,apricot color. i was wondering if anyone had
expierienced this? and if any one rmemeberes writting about it ot
orchid? my guess is it has something to do with the electric
current going through the peice. but it is sucha low voltage that
i did not think it would make a difference.I use the turqouise
and pearls in the speed bright with no trouble. should i worry
abuot this for my moonstones and fire opals,opals in general? any
ideas? 

Hratch Babikian