Spectacular ammonites | The Octopus News Magazine Online
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Spectacular ammonites

neuropteris

GPO
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Jun 25, 2004
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141
#1
Hello all

As Kevin mentioned in his thread its a bit quiet out there in dead ceph land. I for one haven't been out and about as much as I should have and have found squat diddley for months. Here are 3 of the more spectacular ammos on my shelves. All acquisitions, can't claim to have found any of these but they do look very nice even if I do say so myself.

First a Caloceras sp from the Lias of the south of England. 8cm at its widest point and showing the irridesence that that particular locality is famous for.

Second is a monster Cadoceras sublaeve complete to the mouth border. The coin is 2cm for scale. Comes from the Jurassic Kellaways formation of Wiltshire

Thirdly a spiney Sonninia from the Oolite of Dorset. Preserved in calcite and once again the coin is 2cm

All the best

Andy
 

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tonmo

Titanites
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#3
Those are beautiful. I need to get myself an ammonite fossil...

Where does that irridesence come from? i.e., is it formed over time, or...? How does that come about?
 

sorseress

Colossal Squid
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Mar 23, 2005
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#5
tonmo;88436 said:
Those are beautiful. I need to get myself an ammonite fossil...

How big of an ammonite do you want? I have several and can easily get more. Matter of fact, I was going to bring several small ones to tonmocon to use for doorprizes or whatever....
Ortheceras too.
 

tonmo

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#6
Any size... I gotta start with something! Let's PM and transact!
 

neuropteris

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#8
I don't know for certain but I suspect its had a light coat of varnish. The colours are all natural though. I'd love to know how they got the matrix that smooth.

I knew someone was going to ask how the irridesence occurs so thanks Kevin for saving me the job of looking it up :grin: You can occasionally find a mother of pearl effect on Yorkshire coast Dactylioceras though its pretty rare and only affects a small portion of the ammonite.

Andy
 

fluffysquid

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Jul 3, 2003
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295
#9
if you like your ammonites colorful.... I picked up a partial ammonite in Canada last year with a shocking amount of iridescence. A few companies market it as Ammolite in jewelry. nice pictures here: http://en.wikipedia.org/wiki/Ammolite

I also picked up a lesser piece set in a pendant than is pictured there... it only flashes green, blue, and purple!
 

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