Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,456
|
Post by Sabre52 on Feb 19, 2016 9:12:32 GMT -5
Yeah, as John says, I think most black and white "onyx" is dyed. In over fifty years of US collecting, the black and white banded agates I've found have been very scarce. There are some from Backrock eggs, some from Montana up by the Dryhead, some California T-eggs, and some from West Texas, Balmorhea and Marfa black and white but overall a really nice, banded, high contrast, black and white is a very unusual find....Mel
|
|
|
Post by mohs on Feb 19, 2016 13:05:43 GMT -5
but overall a really nice, banded, high contrast, black and white is a very unusual find....Mel Thanks Mel ! I believe my black & white large chunk (posted early) is certainly onyx. I guess it needs to be certified of chalcedony makeup? I been meaning to cut it but don't have the saw for such a large piece. Maybe I'll outsource it and get some slabs.
|
|
metalsmith
Cave Dweller
Member since October 2012
Posts: 1,537
|
Post by metalsmith on Feb 19, 2016 14:15:20 GMT -5
The main item that bugs me is the often failure to differentiate between banded calcite onyx ( travertine) and the much rarer banded agate onyx. In olden times, the only real onyx was banded agate....Mel And in modern times the only real onyx should be banded agate! IMHO, the words Travertine and Onyx are mutually exclusive and only indicative of a seller who has no idea what they are talking about. Unless I was seeing the rock first hand, I'd just steer clear of it.
|
|
|
Post by johnjsgems on Feb 22, 2016 14:05:23 GMT -5
Onyx generally has repeating patterns where banded agates have layered banding.
|
|
|
Post by 1dave on Aug 11, 2016 6:44:05 GMT -5
I'll pass on the anchovies Ed. Love sardines in mustard sauce though. Don't think I have any sardonyx, with or without mustard sauce. I'd have to check buckets in my shed after spring thaw. Weird World How about peanut butter and sardine sandwiches or chocolate coated sardines?
|
|
metalsmith
Cave Dweller
Member since October 2012
Posts: 1,537
|
Post by metalsmith on Sept 3, 2016 7:29:06 GMT -5
Another reference giving the origin of the name 'Sard'
|
|