[Rockhounds] Thai rubies

[Michael Schmidt]

chances are you don't.  but you can try ultrasonic cleaning.  it's not a 
coating- it's an impregnation.  it clarifies the corundum, so if you do get 
it off, the quality of the material (physical appearance) will go into the 
toilet

-----Original Message----- 
From: John Scully
Sent: Friday, April 14, 2017 6:12 PM
To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
Subject: Re: [Rockhounds] Thai rubies

please answer my original question -- how do I get it off!!

🤐

On Apr 14, 2017 8:02 PM, "Michael Schmidt" <dm.schmidt at shaw.ca> wrote:

> The treat is called glass filling.  It has been around since about 2008 or
> 2009, and will turn a ruby worth $5.00 p/ct into something that looks like
> it's worth $5000 p/ct.
>
> Back in 2010 we were buying them in Tucson from dealers for (gasp) $25-45
> p/ct.  Back home, we got multiple appraisals for them in the $6000-11,000
> p/ct range.
>
> That same material today can be bought for $10 p/ct.
>
> Michael
>
> -----Original Message----- From: Kreigh Tomaszewski
> Sent: Friday, April 14, 2017 4:58 PM
> To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
> Subject: Re: [Rockhounds] Thai rubies
>
> 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=0a
> hUKEwitlv7VkqXTAhUM94MKHTnhC-sQ6AEIbjAJ#v=onepage&q=what%20
> is%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:
>> >
>> >    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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