[Rockhounds] quartz sphere question

[Axel Emmermann]

Dave, 

Is this in crystals ore massive quartzite? The crystals that I'm talking
about are only about 1 cm (0,39 in) or less in size. The Afghan quartz
inclusion are a few millimetres.  
Very pretty indeed but small. I can send a photo off list to any who wants
it.

Axel


> -----Oorspronkelijk bericht-----
> Van: rockhounds-bounces at lists.drizzle.com
[mailto:rockhounds-bounces at lists.drizzle.com]
> Namens betdav97 at aol.com
> Verzonden: vrijdag 26 september 2008 22:47
> Aan: rockhounds at lists.drizzle.com
> Onderwerp: Re: [Rockhounds] quartz sphere question
> 
> Axel,
>   Our quartz from WV that has petroleum and
> carbon inclusions, that fluoresce also.
> dave
> 
> 
> -----Original Message-----
> From: Axel Emmermann <axel.emmermann at pandora.be>
> To: 'Rockhounds at drizzle.com: A mailing list for rock and gem
> collectors' <rockhounds at lists.drizzle.com>
> Sent: Fri, 26 Sep 2008 2:46 pm
> Subject: RE: [Rockhounds] quartz sphere question
> 
> 
> 
> I have dome "herkimer quartz" from Afghanistan.
> The gas bubbles inside contain a naturally cracked petroleum with
> methane
> bubbles, petroleum and asphalt. All very nicely fluorescent too.
> The bubbles sometimes show a "negative" quartz crystal shape. As if a
> small
> quartz crystal inside dissolved somehow. Rather puzzling.
> 
> Axel
> 
> > -----Oorspronkelijk bericht-----
> > Van: rockhounds-bounces at lists.drizzle.com
> [mailto:rockhounds-bounces at lists.drizzle.com]
> > Namens Pmodreski at aol.com
> > Verzonden: vrijdag 26 september 2008 4:29
> > Aan: rockhounds at lists.drizzle.com
> > Onderwerp: Re: [Rockhounds] quartz sphere question
> >
> > I'll try too...
> >
> > Almost all quartz crystal will have some imperfections--fractures or
> cloudy
> > patches or inclusions.  If it does have them (check it out with a
> magnifying
> > lens), it's probably confirmed as quartz.  If it has none, if it  is
> > absolutely clear with no flaws at all, it is likely glass.
> >
> > Along the same line, to be more sure; scrutinize any such
> imperfections
> > closely.  If they are bubbles, little spherical ones, it is probably
> glass.  If
> > they are lines or planes of some sort, then, quartz.   If you don't
> see
> ANY
> > such things of any sort--well, as I said, I'd suspect  glass, but one
> couldn't be
> > absolutely certain.
> >
> > Look at in under a black light too.  A lot of glass fluoresces, at
> least
> > slightly; most quartz does not, except for any inclusion particles
> perhaps.
> >
> > Measuring the specific gravity is probably "easier said than done".
> One
> > easy way; weigh it on an accurate balance, then measure the diameter
> with
> an
> > accurate pair of calipers, and calculate the volume and then the
> specific
> > gravity, using "simple geometry which everyone remembers (ha ha) from
> high
> school &
> > college math & physics.  Quartz should be very close to  2.65 grams
> per
> cubic
> > centimter; glass, as Kreigh says, should be somewhat  less.
> >
> > P.S., I just tried looking this up (density of glass), and the two
> are so
> > close, it would not be very reliable to use density to distinguish
> them,
> I'm
> > afraid.  I find the density of common "crown" glass to be around 2.5
> g/cc,
> but
> > can vary from 2.4 to 2.8, and "flint glass" and lead crystal (which is
> glass)
> > are even higher.  Oh well.
> >
> > cheers,
> > Pete
> >
> >
> >
> > **************Looking for simple solutions to your real-life financial
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