[Rockhounds] UV Light recommendations wanted

[Axel Emmermann]

I see that there is ample response to your question.
I'll just hop to the radioactivity question?

If the hyalite isn't perched on some primary uranium ore like uraninite,
you'll be quite safe.
Uranyl ion is very mobile since it travels in water very easily. Opal is
built from cryptocrystalline microspheres, the uranyl resides in solution,
in-between those spheres. Very little is needed to cause fluorescence.
I wouldn't eat the specimens, but otherwise there's no danger.

Axel

-----Oorspronkelijk bericht-----
Van: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> Namens John
Scully
Verzonden: dinsdag 10 juli 2018 0:18
Aan: Rockhounds <rockhounds at rockhounds.drizzle.com>; Patrick Rowe
<rowe_patrick at ymail.com>; rex nelson <sagebrushhome at q.com>; alan perryman
<altperr at yahoo.com>
Onderwerp: [Rockhounds] UV Light recommendations wanted

Hi, All

I just purchased about 100 pounds of hyalite opal on chalcedony from Mexico.
Now I want to put it under a UV light.  So, I am asking for recommendations
on what to purchase.  Questions such as:

1.  SW vs. LW?
2.  Flashlight size units?
3.  Larger units?
4.  Battery operated?
5.  Price range -- this is important to me.  anything useful at around $200?

Also, does hyalite have any radioactivity?

Thanks

John Scully
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