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: warinro...@yahoo.fr
> Subject: Re : [meteorite-list] Moissanite
> To: rsvp...@hotmail.com; meteorite-list@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
> À : meteoritelist meteoritelist
> Envoyé le : Mardi, 18 Août 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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