Joined: Sun Oct 16, 2005 12:22 pm Posts: 21602 Location: San Francisco
IMO, just an example of using some "buzz words" as a sales gimmick. I bet dollars to donuts it is available on home shopping networks.
Quote:
On Sunday, July 06, 2008, a U.S. federal trademark registration was filed for PARAIBA CHALCEDONY by Dholakia, Ketan, West Palm Beach 33421. The USPTO has given the PARAIBA CHALCEDONY trademark serial number of 77515376. The current federal status of this trademark filing is ABANDONED-FAILURE TO RESPOND OR LATE RESPONSE. The correspondent listed for PARAIBA CHALCEDONY is DHOLAKIA, KETAN of PO BOX 212225, WEST PALM BEACH, FL 33421-2225, . The PARAIBA CHALCEDONY trademark is filed in the category of Jewelery Products . The description provided to the USPTO for PARAIBA CHALCEDONY is Agate microcrystalline gemstone color-enhanced to a blue, greenish blue, bluish green or neon blue color.
this seems like a complete stretch in trying to attach these buzz words to materials where they dont apply. especially considering the difficulties surrounding name disclosure with african cu-bearing tourmalines. using paraiba to describe anything else only seems like it shold be applicable to material from the state itself... not things that resemble these other things that come from a particular place.
Is it possible to take light colored paraiba or cuprian tourmaline and "add" copper somehow to increase that color? In other words, is there a known treatment?
Joined: Fri Oct 19, 2007 5:04 pm Posts: 1642 Location: Walnut Creek, CA
I don't know about the material called "Paraiba Chalcedony", but re-reading this thread, reminded me about "Fischer stone". In that case, the coloring solution is based on CuCl2, and a bright blue/green color can be achieved. And they also add a beautiful dendrite as a bonus! They start with a porous white translucent agate ("Snakeskin agate" typically).
(this is a very beautiful cab of Fischer Stone cut by Samsilverhawk)
That said, the "Paraiba Chalcedony" in question could be something entirely different. The Fischer stone seems to have some interesting similarities tho.
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