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August 15, 2012
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Sparkling Cream and Gold Ammonite Pendant by magpie-poet Sparkling Cream and Gold Ammonite Pendant by magpie-poet
Ammonite half in 14K gold fill.

2 1/18" by just over 1 1/4" wide.

Picked this guy up at the mineral show this weekend, anyone know where it's from or why the different coloring and crystalization than the brown/grey I've seen most commonly? I've seen plenty of shades of brown varients but never anything this pale or with those almost hairlike crystals in the chambers.

Sold, though it has cousins on my etsy shop [link]

(I'd still like to know why the drastic color difference and crystal shape, and where I can get more, if anyone knows the answer to any or all of those questions!)
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:iconzahnradfee:
Hm, I can only theorize, but I guess the crystals come from a faster cooling of the silicic acid.

In other ammonites the crystals are larger and fill out the entire shell. They are so large that you can see they are mostly clear or stained brown.

When the silicic acid cools down faster, it can't make large crystals, but only small ones. They will refract the light in a way that they seem not clear but white.

And obviously the petrification process was over quite soon with no more silicic acid diffusing into the shell. That, which was already in, crystallized (reducing its volume by that, so that there are holes left) and then nothing more came.
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:iconmagpie-poet:
Neat, thank you! I wasn't sure what caused large or small crystals forming. I noticed that these were longer and thinner than I usually see. A lot of times the proportions seem about the same regardless of the size.
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:iconorphanalien:
OrphanAlien Jan 13, 2014  Hobbyist Traditional Artist
this is just gorgeous

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:iconmagpie-poet:
Many thanks! I've yet to find another ammonite like this. Always keeping an eye out :)
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:iconslave2karma:
Oooooh this is just lovely! The wire wrapping compliments the ammonite so perfectly! :heart:
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:iconnehemet:
Nehemet Oct 28, 2012  Hobbyist Artisan Crafter
Wow. Nicely framed!
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:iconmagpie-poet:
Many thanks, they're a crabby shape to work with, but I love them!
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:icondpbjewelry:
The frosty crystals are remarkable. It looks almost soft. Once again, reluctantly approving the twisted wire. Ugh, Sandra, stop making me eat my words. :P
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:iconmagpie-poet:
:glomp: and :giggle: They do look almost soft until they twinkle.
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