[meteorite-list] Re : Moissanite

From: Pete Pete <rsvp321_at_meteoritecentral.com>
Date: Tue, 18 Aug 2009 17:14:01 -0400
Message-ID: <BAY141-W10C244F7F38D5E680C8F07F8FF0_at_phx.gbl>

 
Hi, Roger and all,
 
Here are some of the pictures I found impressive:
 
http://images.google.ca/images?hl=en&q=moissanite&um=1&ie=UTF-8&sa=N&tab=wi
http://images.google.ca/images?hl=en&q=moissanite&um=1&ie=UTF-8&sa=N&tab=wi
 
Cheers
Pete


________________________________
> Date: Tue, 18 Aug 2009 19:10:03 +0000
> From: warinroger at yahoo.fr
> Subject: Re : [meteorite-list] Moissanite
> To: rsvp321 at hotmail.com; meteorite-list at meteoritecentral.com
>
>
>
>
> Hi Pete, all,
>
>
>
> A large number of polytypes of moissanite is known, predominantly hexagonal or rhombohedral. It is an essential difference compared to the diamond and it is cheap to observe Moissanite trough a microscope.
> Thus, Moissanite is dichroic (birefingence), unlike the diamond. It appears therefore a duplication of the edges of the faces when we see the stone under the microscope.
> The white color of moissanite is not as white as diamonds of the highest quality (Class D). But the refracted colors are more intense.
>
> * Hardness: 9.25 - 9,50
> * Refractive index : Diamond : 2.417
>
> Moissanite : 2.65 ? 2.69.
>
>
>
> First occurrence: Canyon Diablo meteorite, Meteor Crater.
>
>
>
> The probability of forming diamond on Earth is higher than the formation of Moissanite. As against meteorites can prevail conditions of pressure and temperature on a larger scale in comparison with Earth, it seems natural that the presence of Moissanite is favored in some meteorites. Indeed, scattering of carbon (C) and silicon (Si) in asteroids is larger than in the kimberlite cones.
>
> You can see a pic of an artificial Moissanite ("brilliant-cut? & diameter 6.5 mm, 1.00 carat).
> It is difficult to shoot moissanite because the gemstone is a light trap. It seems black.
>
>
>
> http://s590.photobucket.com/albums/ss348/Pierreponce_2009/
>
>
>
> Roger.
>
>
> ________________________________
> De : Pete Pete
> ? : meteoritelist meteoritelist
> Envoy? le : Mardi, 18 Ao?t 2009, 14h01mn 48s
> Objet : [meteorite-list] Moissanite
>
>
>
> Dear List,
>
> I'm curious if any have been faithful to our meteorite passion and made a jewellery purchase with moissanite?
>
>
> http://en.wikipedia.org/wiki/Moissanite
> http://en.wikipedia.org/wiki/Moissanite
>
> I've had a look at these gems, and they are quite spectacular!
> Also, for the discerning shopper, cheaper than
> diamonds.
>
> Cheers,
> Pete
>
>
>
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_________________________________________________________________
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Received on Tue 18 Aug 2009 05:14:01 PM PDT