SEDA JEWELERY

MAMMOTH AMMOLITE

This is a natural ammolite  stone  from  Canada that has been set in mammoth ivory.The Ammolite pieces are set in resin and are brilliant in colour.It is ideal as a brooch/tie clip or you could take it out and re set it.

Gold plated

 Weight 67.90 cts app

Size 30x25x8 mm app

Ammolite is a rare and valuable opal-like organic gemstone found primarily along the eastern slopes of the Rocky Mountains of the United States and Canada. It is made of the fossilized shells of ammonites, which in turn are composed primarily of aragonite, the same mineralthat makes up nacreous pearls.

An iridescent opal-like play of color is shown in fine specimens, mostly in shades of green and red; all the spectral colors are possible, however. The iridescence is due to the microstructure of the aragonite: unlike most other gems, whose colors come from light absorption, the iridescent color of ammolite comes from interference with the light that rebounds from stacked layers of thin platelets that make up the aragonite. The thicker the layers, the more reds and greens are produced; the thinner the layers, the more blues and violets predominate. Reds and greens are the most commonly seen colors, owing to the greater fragility of the finer layers responsible for the blues.

Treatments Although fully mineralized and containing no water—and therefore not subject to dehydration and subsequent crazing—ammolite is often damaged due to environmental exposure. The thin, delicate sheets in which ammolite occurs are also problematic; for these reasons, most material is impregnated with a clear epoxy or other synthetic resin to stabilize the flake-prone ammolite prior to cutting. Although the tessellated cracking cannot be repaired, the epoxy prevents further flaking and helps protect the relatively soft surface from scratching.

 MAMMOTH IVORY

 Fossil mammoth ivory is not regulated by the conference on international trade in endangered species.[CITIES] or by any govt agencies.

Mammoth ivory has been found in Europe, North America and Asia since the end of the last ice age. The wooly mammoth roamed across the land bridge between Siberia and Alaska during the ice age when parts of Alaska and the Yukon in Canada were free of ice. 

mammoth tusk ivory comes from the two modified upper incisors of extant and extinct members of the order Proboscidea. Mammoths are believed to have been extinct for 10,000 years. Because of the geographical range in Alaska and Siberia, Mammuthus primigenius tusks have been well preserved. Therefore, Mammuthus primigenius is the only extinct proboscidan which consistently provides high quality, carvable ivory.