30.50CTS IRREDESENT AMMONITE PENDANT-FACTORY DIRECT [SJ1782]

SEDA JEWELERY

IRRIDESENT AMMONITE

This is a colourful natural specimen of a ammonite from Madgascar  Africa with opal like colours.Silver swirl in the centre

Quality workmanship

Silver stamped 925

Amount of silver used 1.90 grams app

Weight 30.50 cts app

Size 29 x 15 mm app

We contract out our jewelery to one factory in asia where we supply both the silver and stones used so we can control the quality.

  

Ammonites, as they pertain specifically to the order Ammonitida, are an extinct group of marine animals belonging to the cephalopod subclass Ammonoidea. They are excellent index fossils, and it is often possible to link the rock layer in which they are found to specific geological time periods.

The closest living relative of the Ammonitida, is not the modern Nautilus which they somewhat outwardly resemble, but rather the subclass Coleoidea (octopus, squid, and cuttlefish).

Their fossil shells usually take the form of planispirals, although there were some helically-spiraled and non-spiraled forms (known as "heteromorphs"). Their name came from their spiral shape as their fossilized shells somewhat resemble tightly-coiled rams' horns. 

 

 

 

Other fossils, such as many found in Madagascar and Alberta (Canada), display iridescence. These iridescent ammonites are often of gem quality (ammolite) when polished. In no case would this iridescence have been visible during the animal's life; additional shell layers covered it.

Ammonite fossils became less abundant during the latter part of the Mesozoic, with none surviving into the Cenozoic era. The last surviving lines disappeared along with the dinosaurs 65 million years ago in the Cretaceous-Tertiary extinction  event. That no ammonites survived the extinction event at the end of the Cretaceous, while some nautiloid cousins survived, might be due to differences in ontogeny. If their extinction was due to a bolide strike, plankton around the globe could have been severely diminished, thereby dooming ammonite reproduction during its planktonic stage.

 

Australian buyer have to pay 10% gst and auctions are in $ US
ONE ITEM
Our basic shipping /handling fee is $4.00 per item sent first class airmail.
FOUR ITEMS
We offer a combine shipping/handling of 4 items from the one site for $9-this is done automatically when you go to paypal.
EIGHT ITEMS
You must have 5 feed backs and contact us before bidding and we will send you a paypal request with a handling/shipping fee of $15
EIGHT TO 30 ITEMS
You must have 10 feedbacks to purchase larger numbers and contact us before bidding.We will send this parcel by courier express with a tracking number for $45

PLEASE NOTE-We have the following sites listed below so if you pay insurance for one site we can send all the orders together so only pay insurance once.

At Opal Auctions we have the following sites one click away. :

SEDAOPALS

BOULDER MAGIC

COOBER PEDY FIRE

QUALITY OPALS

SEDA ROUGH OPAL

VOLCANIC OPALS

At Gem Rock Auctions we have the following sites. :

SEDAGEMS

MINERAL GEM WORLD

GEMS TO WEAR

QUALITY ROUGH

PEARL FARM

SEDA DIAMONDS

At Jewelry Auctioned we have the following sites :

SEDA JEWELERY

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