[Rockhounds] Thai rubies

[Kreigh Tomaszewski]

There is a possibility the coating is glass

https://books.google.com/books?id=5BsyBwAAQBAJ&pg=PA99&lpg=PA99&dq=what+is+the+coating+on+thai+rubies&source=bl&ots=SFzyR3l_SP&sig=gjQdmUEI4zYSzzKiWqvHi2ZVr6o&hl=en&sa=X&ved=0ahUKEwitlv7VkqXTAhUM94MKHTnhC-sQ6AEIbjAJ#v=onepage&q=what%20is%20the%20coating%20on%20thai%20rubies&f=false

On Fri, Apr 14, 2017 at 7:43 PM, Tim Fisher <nospam at orerockon.com> wrote:

> I asked a Thai gemstone dealer friend, I'll let you know what he says.
>
> Tim Fisher
> Orerockon.com
>
>
> -----Original Message-----
> From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On
> Behalf Of Bart Heymans
> Sent: Friday, April 14, 2017 4:07 PM
> To: rockhounds at rockhounds.drizzle.com
> Subject: Re: [Rockhounds] Rockhounds Digest, Vol 4, Issue 6
>
> Hi,
>
> Could the coating be shellac?
>
> Regards,
>
> Bart Heymans
> Op do 13 apr. 2017 om 21:00 schreef <
> rockhounds-request at rockhounds.drizzle.com>
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> > Today's Topics:
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> >    1. Cleaning Thai Rubies (John Scully)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Wed, 12 Apr 2017 14:03:15 -0600
> > From: John Scully <jscully216 at gmail.com>
> > To: Rockhounds <rockhounds at lists.drizzle.com>
> > Subject: [Rockhounds] Cleaning Thai Rubies
> > Message-ID:
> >         <CAB2BCLZ0p2G8izxG9Ga=GRwr_JqMrGhAMPrUEhikRD50LPN0=
> > w at mail.gmail.com>
> > Content-Type: text/plain; charset=UTF-8
> >
> > Hi,
> >
> > I just got back from Thailand and, among new treasures, is a bag of
> > bright but lesser quality rubies and sapphires.  They are heavily
> > coated with something that brings out their color but looks fake --
> > waxy, shiny.  At first I thought it was just some acrylic or shellac,
> > but neither alcohol nor varsol touches it.  OI can scratch it with a
> knife, but that is all.
> >
> > Any ideas on what it is and how on earth to get rid of it??
> >
> > Thanks
> > John Scully
> > ?
> >
> >
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> > End of Rockhounds Digest, Vol 4, Issue 6
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