Ammolite - Kaleidoscopic Fossil Gems

Ammolite is an organic gem similar to opal, primarily found along the eastern slopes of the Rocky Mountains in North America. Ammolite is composed of fossilized shells of ammonites, which in turn are primarily made of aragonite, the same mineral found in mother-of-pearl, with a microstructure inherited from the shell. It is one of the few biogenic gemstones; others include amber and pearl.
The chemical composition of ammolite varies and may include calcite, silica, pyrite, or other minerals in addition to aragonite. The shell itself may contain numerous trace elements, including aluminum, barium, chromium, copper, iron, magnesium, manganese, strontium, titanium, and vanadium. Its crystallography is orthorhombic. Its hardness ranges from 4.5 to 5.5, and its specific gravity ranges from 2.60 to 2.85.
In high-quality specimens, an iridescent opal-like play of color is observed, primarily in shades of green and red, although all spectral colors are possible. The iridescence is due to the microstructure of the aragonite: unlike most other gems, whose colors result from light absorption, the iridescent color of ammolite arises from interference with the light bouncing off stacked layers of thin platelets that make up the aragonite.
Significant deposits of gem-quality ammolite are found exclusively in the Bearpaw Formation, which extends from Alberta to Saskatchewan in Canada and south to Montana in the USA.
Ammolite originates from the fossil shells of the Upper Cretaceous disk-shaped ammonites Placenticeras meeki and Placenticeras intercalare, and (to a lesser extent) the cylindrical baculite, Baculites compressus. Ammonites were cephalopods that thrived in tropical seas until becoming extinct along with the dinosaurs at the end of the Mesozoic era.

Canada

Silver Pendant with Fossil Ammolite.
Canada
62mm

€900.00 Ex Tax: €900.00

This silver pendant highlights an ammolite gemstone with a stunning color palette that ranges from golden yellow to intense orange, with touches of bright green and violet reflections. The gem, with i..

Canada

Silver Pendant with Ammolite: The Magic of Reflect...
Canada
88mm

€1,250.00 Ex Tax: €1,250.00

With a sleek and sophisticated shape, this silver pendant frames a rare and beautiful ammolite gemstone, featuring reflections that range from vibrant green to golden bronze, with hints of electric bl..

Canada

Silver Jewel with Iridescent Green and Blue Ammoli...
Canada
78mm

€1,580.00 Ex Tax: €1,580.00

This extraordinary silver pendant holds a fragment of ammolite, an exceptionally rare gemstone derived from the fossilized shell of ammonites that lived over 70 million years ago in what is now the Ca..

Canada

Rare Silver Pendant with Large Ammolite Gem
Canada
97mm

€1,350.00 Ex Tax: €1,350.00

Extraordinary and Eclectic Silver Pendant, featuring a generously sized ammolite gem. This exclusive piece of jewelry is a unique work of art, created for those who appreciate the allure of rare gems ..

Canada

Jewel with Rare Ammolite Gemstone.
Canada
64mm

€900.00 Ex Tax: €900.00

This elegant silver pendant features an ammolite gemstone with warm and enveloping tones ranging from burnt orange to deep red, with flashes of bright green and hints of deep blue. The gem captures th..

Canada

Extraordinary Placenticeras Intercalare Ammonite.
Canada
9,340g

€80,000.00 Ex Tax: €80,000.00

Ammonite with Ammolite (Placenticeras intercalare) - Alberta, CanadaThis extraordinary ammonite of the species Placenticeras intercalare is a masterpiece of nature, originating from the ancient format..

Canada

Exclusive Silver Pendant with an Imposing Ammolite...
Canada
102mm

€1,650.00 Ex Tax: €1,650.00

This silver pendant, of rare beauty, is a masterpiece of elegance and distinction, adorned with an imposing ammolite gem that captures both the eye and the imagination. Created for those with an appre..

Canada

Exclusive Silver Jewelry with Ammoliteò.
Canada
75mm

€1,100.00 Ex Tax: €1,100.00

With its soft and enveloping shape, this silver pendant highlights an ammolite gemstone that seems to capture the colors of an enchanted forest. The shades of deep green and gold blend with orange and..

Canada

Exceptional Ammolitized Placenticeras Intercalare.
Canada
6,190g

€65,000.00 Ex Tax: €65,000.00

A Masterpiece of Prehistory, a Paleontological and Collectible Treasure.This extraordinary fossil of Placenticeras Intercalare comes from the prestigious Bearpaw Formation in Alberta, Canada, and repr..

Canada

Ammolite Gem silver Pendant
Canada
10g

€290.00 Ex Tax: €290.00

Beautiful Ammolite gemstone from Alberta Canada.Ammolite is a mineral obtained from the fossilized shell of ammonites and characterized by an iridescent surface with bright tones that change according..

Canada

Ammolite
Canada
18g

€150.00 Ex Tax: €150.00

Ammolite is a stone of organic origin, mainly found on the Rocky Mountains of Canada. It is made of the fossil shells of ammonite, which are composed of aragonite, the mineral forming the nacre, but w..

Canada

Ammolite
Canada
43g

€195.00 Ex Tax: €195.00

Ammolite is an extraordinary stone of organic origin, with stunning reflections mainly in orange and green.Originated from ammonite's fossils, they have preserved a thin layer or aragonite, the materi..

Showing 1 to 12 of 12 (1 Pages)
Silver Pendant Ammonite with Ammolite
Sold

Italy

Silver Pendant Ammonite with Ammolite
Italy
42mm

€225.00 Ex Tax: €225.00

Pendant is made of 925 silver, the shape of the pendant is that of a fossil ammonite, a spiraling shell that once belonged to an extinct marine mollusk. The design is detailed and accurate, capturing ..

Silver Pendant Ammonite with Ammolite
Sold

Italy

Silver Pendant Ammonite with Ammolite
Italy
42mm

€245.00 Ex Tax: €245.00

Pendant made with great craftsmanship, a section of a Cleoniceras fossil ammonite. This Ammonite section has been dissected to show the inner chambers, which became the perfect space for displaying th..

Placenticeras Costatum Ammonite
Sold

Canada

Placenticeras Costatum Ammonite
Canada
5,200g

€65,000.00 Ex Tax: €65,000.00

Rare example for quality and size of Ammonite Placenticeras Costatum with Ammolite.In addition to the charm given by its iridescence, this specimen is characterized by having both sides well pres..

Ammonite Placenticeras Costatum
Sold

Canada

Ammonite Placenticeras Costatum
Canada
9,500g

€19,000.00 Ex Tax: €19,000.00

A rare and nothing short of fantastic Ammonite Placenticeras Costatum with Ammolite.Premium quality specimen characterized by an opalescence that covers the entire surface of the fossil and ranges fro..

Ammonite Placenticeras Costatum
Sold

Canada

Ammonite Placenticeras Costatum
Canada
6,300g

€30,000.00 Ex Tax: €30,000.00

Placenticeras Costatum Ammonite Specimen with Ammolite of EXTRA quality!This specimen is characterized by an impressive iridescence, very marked and saturated with bright and vivid colors that range m..

Ammonite Fossil with Ammolite Inlay
Sold

Italy

Ammonite Fossil with Ammolite Inlay
Italy
54mm

€295.00 Ex Tax: €295.00

Silver jewel with Cleoniceras ammonite, the chambers of which were filled with inlaid ammolite. The Cleoniceras ammonite, a species of extinct marine mollusk similar to the modern nautilus, offers a w..

Ammolite
Sold

Canada

Ammolite
Canada
35g

€140.00 Ex Tax: €140.00

Rare specimen of Ammolite, a fantastic fossil mineral derived from the fossilized shells of extinct Ammonites coming only from the formation of Bearpaw in Alberta, Canada.Its lamellar structure allows..

Ammolite
Sold

Canada

Ammolite
Canada
10g

€100.00 Ex Tax: €100.00

Rare example of Ammolite from Albera in Canada.Ammolite is a mineral obtained from the fossilized shell of Ammonites and characterized by an iridescent surface with bright tones that change according ..

Ammolite
Sold

Canada

Ammolite
Canada
17g

€110.00 Ex Tax: €110.00

Rare example of Ammolite from Albera in Canada.Ammolite is a mineral obtained from the fossilized shell of Ammonites and characterized by an iridescent surface with bright tones that change according ..

Ammolite
Sold

Canada

Ammolite
Canada
20g

€150.00 Ex Tax: €150.00

Ammolite is a stone of organic origin with a unique iridescence, coming from the nacre component of the fossils of which is formed. Sometimes it is called also with the name of ammonite, but it was bo..

Ammolite
Sold

Canada

Ammolite
Canada
22g

€130.00 Ex Tax: €130.00

Rare example of Ammolite from Albera in Canada.Ammolite is a mineral obtained from the fossilized shell of Ammonites and characterized by an iridescent surface with bright tones that change according ..

Ammolite
Sold

Canada

Ammolite
Canada
19g

€100.00 Ex Tax: €100.00

Rare example of Ammolite from Albera in Canada.Ammolite is a mineral obtained from the fossilized shell of Ammonites and characterized by an iridescent surface with bright tones that change according ..

Ammolite
Sold

Canada

Ammolite
Canada
46g

€140.00 Ex Tax: €140.00

Ammolite is an extraordinary stone not only for its coloring but also for its particular formation.Being of organic origin, it was formed from the fossils of some ammonites mainly in the mountains of ..

Showing 1 to 13 of 13 (1 Pages)

Canada

Silver Pendant with Fossil Ammolite.
Canada
62mm

€900.00 Ex Tax: €900.00

This silver pendant highlights an ammolite gemstone with a stunning color palette that ranges from golden yellow to intense orange, with touches of bright green and violet reflections. The gem, with i..

Canada

Silver Pendant with Ammolite: The Magic of Reflect...
Canada
88mm

€1,250.00 Ex Tax: €1,250.00

With a sleek and sophisticated shape, this silver pendant frames a rare and beautiful ammolite gemstone, featuring reflections that range from vibrant green to golden bronze, with hints of electric bl..

Canada

Silver Jewel with Iridescent Green and Blue Ammoli...
Canada
78mm

€1,580.00 Ex Tax: €1,580.00

This extraordinary silver pendant holds a fragment of ammolite, an exceptionally rare gemstone derived from the fossilized shell of ammonites that lived over 70 million years ago in what is now the Ca..

Canada

Rare Silver Pendant with Large Ammolite Gem
Canada
97mm

€1,350.00 Ex Tax: €1,350.00

Extraordinary and Eclectic Silver Pendant, featuring a generously sized ammolite gem. This exclusive piece of jewelry is a unique work of art, created for those who appreciate the allure of rare gems ..

Canada

Jewel with Rare Ammolite Gemstone.
Canada
64mm

€900.00 Ex Tax: €900.00

This elegant silver pendant features an ammolite gemstone with warm and enveloping tones ranging from burnt orange to deep red, with flashes of bright green and hints of deep blue. The gem captures th..

Canada

Extraordinary Placenticeras Intercalare Ammonite.
Canada
9,340g

€80,000.00 Ex Tax: €80,000.00

Ammonite with Ammolite (Placenticeras intercalare) - Alberta, CanadaThis extraordinary ammonite of the species Placenticeras intercalare is a masterpiece of nature, originating from the ancient format..

Canada

Exclusive Silver Pendant with an Imposing Ammolite...
Canada
102mm

€1,650.00 Ex Tax: €1,650.00

This silver pendant, of rare beauty, is a masterpiece of elegance and distinction, adorned with an imposing ammolite gem that captures both the eye and the imagination. Created for those with an appre..

Canada

Exclusive Silver Jewelry with Ammoliteò.
Canada
75mm

€1,100.00 Ex Tax: €1,100.00

With its soft and enveloping shape, this silver pendant highlights an ammolite gemstone that seems to capture the colors of an enchanted forest. The shades of deep green and gold blend with orange and..

Canada

Exceptional Ammolitized Placenticeras Intercalare.
Canada
6,190g

€65,000.00 Ex Tax: €65,000.00

A Masterpiece of Prehistory, a Paleontological and Collectible Treasure.This extraordinary fossil of Placenticeras Intercalare comes from the prestigious Bearpaw Formation in Alberta, Canada, and repr..

Canada

Ammolite Gem silver Pendant
Canada
10g

€290.00 Ex Tax: €290.00

Beautiful Ammolite gemstone from Alberta Canada.Ammolite is a mineral obtained from the fossilized shell of ammonites and characterized by an iridescent surface with bright tones that change according..

Canada

Ammolite
Canada
18g

€150.00 Ex Tax: €150.00

Ammolite is a stone of organic origin, mainly found on the Rocky Mountains of Canada. It is made of the fossil shells of ammonite, which are composed of aragonite, the mineral forming the nacre, but w..

Canada

Ammolite
Canada
43g

€195.00 Ex Tax: €195.00

Ammolite is an extraordinary stone of organic origin, with stunning reflections mainly in orange and green.Originated from ammonite's fossils, they have preserved a thin layer or aragonite, the materi..

Silver Pendant Ammonite with Ammolite
Sold

Italy

Silver Pendant Ammonite with Ammolite
Italy
42mm

€225.00 Ex Tax: €225.00

Pendant is made of 925 silver, the shape of the pendant is that of a fossil ammonite, a spiraling shell that once belonged to an extinct marine mollusk. The design is detailed and accurate, capturing ..

Silver Pendant Ammonite with Ammolite
Sold

Italy

Silver Pendant Ammonite with Ammolite
Italy
42mm

€245.00 Ex Tax: €245.00

Pendant made with great craftsmanship, a section of a Cleoniceras fossil ammonite. This Ammonite section has been dissected to show the inner chambers, which became the perfect space for displaying th..

Placenticeras Costatum Ammonite
Sold

Canada

Placenticeras Costatum Ammonite
Canada
5,200g

€65,000.00 Ex Tax: €65,000.00

Rare example for quality and size of Ammonite Placenticeras Costatum with Ammolite.In addition to the charm given by its iridescence, this specimen is characterized by having both sides well pres..

Ammonite Placenticeras Costatum
Sold

Canada

Ammonite Placenticeras Costatum
Canada
9,500g

€19,000.00 Ex Tax: €19,000.00

A rare and nothing short of fantastic Ammonite Placenticeras Costatum with Ammolite.Premium quality specimen characterized by an opalescence that covers the entire surface of the fossil and ranges fro..

Ammonite Placenticeras Costatum
Sold

Canada

Ammonite Placenticeras Costatum
Canada
6,300g

€30,000.00 Ex Tax: €30,000.00

Placenticeras Costatum Ammonite Specimen with Ammolite of EXTRA quality!This specimen is characterized by an impressive iridescence, very marked and saturated with bright and vivid colors that range m..

Ammonite Fossil with Ammolite Inlay
Sold

Italy

Ammonite Fossil with Ammolite Inlay
Italy
54mm

€295.00 Ex Tax: €295.00

Silver jewel with Cleoniceras ammonite, the chambers of which were filled with inlaid ammolite. The Cleoniceras ammonite, a species of extinct marine mollusk similar to the modern nautilus, offers a w..

Ammolite
Sold

Canada

Ammolite
Canada
35g

€140.00 Ex Tax: €140.00

Rare specimen of Ammolite, a fantastic fossil mineral derived from the fossilized shells of extinct Ammonites coming only from the formation of Bearpaw in Alberta, Canada.Its lamellar structure allows..

Ammolite
Sold

Canada

Ammolite
Canada
10g

€100.00 Ex Tax: €100.00

Rare example of Ammolite from Albera in Canada.Ammolite is a mineral obtained from the fossilized shell of Ammonites and characterized by an iridescent surface with bright tones that change according ..

Ammolite
Sold

Canada

Ammolite
Canada
17g

€110.00 Ex Tax: €110.00

Rare example of Ammolite from Albera in Canada.Ammolite is a mineral obtained from the fossilized shell of Ammonites and characterized by an iridescent surface with bright tones that change according ..

Ammolite
Sold

Canada

Ammolite
Canada
20g

€150.00 Ex Tax: €150.00

Ammolite is a stone of organic origin with a unique iridescence, coming from the nacre component of the fossils of which is formed. Sometimes it is called also with the name of ammonite, but it was bo..

Ammolite
Sold

Canada

Ammolite
Canada
22g

€130.00 Ex Tax: €130.00

Rare example of Ammolite from Albera in Canada.Ammolite is a mineral obtained from the fossilized shell of Ammonites and characterized by an iridescent surface with bright tones that change according ..

Ammolite
Sold

Canada

Ammolite
Canada
19g

€100.00 Ex Tax: €100.00

Rare example of Ammolite from Albera in Canada.Ammolite is a mineral obtained from the fossilized shell of Ammonites and characterized by an iridescent surface with bright tones that change according ..

Ammolite
Sold

Canada

Ammolite
Canada
46g

€140.00 Ex Tax: €140.00

Ammolite is an extraordinary stone not only for its coloring but also for its particular formation.Being of organic origin, it was formed from the fossils of some ammonites mainly in the mountains of ..

Showing 1 to 25 of 25 (1 Pages)