[Rockhounds] Thai rubies

Fri Apr 14 18:59:59 PDT 2017

done properly, it's an impregnation.  Chances are, based on your 
description, it's not your typical glass filled corundum.  So, assuming it's 
glass, it doesn't sound like it was done properly.

Good luck!

-----Original Message----- 
From: John Scully
Sent: Friday, April 14, 2017 6:54 PM
To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
Subject: Re: [Rockhounds] Thai rubies

I'll try it.  It's more than an impregnation -- it's a thick coating.

☺

On Fri, Apr 14, 2017 at 7:44 PM, Michael Schmidt <dm.schmidt at shaw.ca> wrote:

> 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
>>> > ?
>>> >
>>> >
>>> > ------------------------------
>>> >
>>> > Subject: Digest Footer
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