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Description
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Ammonite cab ~
Offered here is a large cabochon cut from a fossil ammonite, from Madagascar. The species is Cleoniceras madagascariense, and I'm told it lived hundreds of millions of years ago. This example is shades of amber, and shows a fascinating suture pattern of growth events which can be seen as white lines, some of which resemble the shape of oak leaves. Those interlocking sutures are thought to have allowed the living ammonite to withstand the immense pressure of the underwater depths. Some areas of the sutures contain a thin vein of pyrite (or perhaps marcasite) that gleams dark silver at certain angles. When backlit, this gemmy beauty is very translucent, and reminds me of marmalade jam. There are a couple of tiny natural voids, though they're not easy noticed unless you search for them. No doubt it'll make a fascinating piece of jewelry! The cab has a well rounded dome of 5mm, a versatile designer shape, and a nice glossy polish both front and back.
Size: 58x25mm
Weight: approximately 56 carats
Price: SOLD See current gemstones for sale
 Ammonite
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