Rocks, Minerals & Fossils

Fossil Rocks, Minerals & Fossils

165ct Cut Opalized Ammonite Fossil Half First Image

#image-loader-main { display: none; }

165ct Cut Opalized Ammonite Fossil Half First Image

165ct Cut Opalized Ammonite Fossil Half

Total Sales3 Sold

Median Sale Price

Sale Price Range

Similar Upcoming Sales

Large Polished Ammonite Fossil (1 of 4)

Large Polished Ammonite Fossil

Fossils & Gemstones of Houston

Feb 22, 2026

End Chambered Ammonite Fossil (1 of 3)

End Chambered Ammonite Fossil

Fossils & Gemstones of Houston

Feb 22, 2026

Large Polished Ammonite Fossil (1 of 3)

Large Polished Ammonite Fossil

Fossils & Gemstones of Houston

Feb 22, 2026

15.5 gram Natural OPALIZED Ammonite Fossil (1 of 3)

15.5 gram Natural OPALIZED Ammonite Fossil

Antique Finder Services

2 days Left

Fossil Ammonite 408 to 65 Million Years Old Paleozoic to Mesozoic Era (1 of 6)

Fossil Ammonite 408 to 65 Million Years Old Paleozoic to Mesozoic Era

Heartland Artifact Auctions

Feb 15, 2026

Iridescent Fossil Cleoniceras Ammonite (1 of 1)

Iridescent Fossil Cleoniceras Ammonite

TimeLine Auctions Ltd.

Mar 07, 2026

End Chambered Ammonite Fossil (1 of 4)

End Chambered Ammonite Fossil

Fossils & Gemstones of Houston

Feb 22, 2026

Large Fossil Agadir Ammonite (1 of 1)

Large Fossil Agadir Ammonite

TimeLine Auctions Ltd.

Mar 07, 2026

End Chambered Ammonite Fossil (1 of 4)

End Chambered Ammonite Fossil

Fossils & Gemstones of Houston

Feb 22, 2026

Iridescent Fossil Cleoniceras Ammonite (1 of 1)

Iridescent Fossil Cleoniceras Ammonite

TimeLine Auctions Ltd.

Mar 07, 2026

Large Split Ammonite Fossil Pair (1 of 1)

Large Split Ammonite Fossil Pair

Fossils & Gemstones of Houston

Feb 22, 2026

Split Ammonite Fossil Pair (1 of 1)

Split Ammonite Fossil Pair

Fossils & Gemstones of Houston

Feb 22, 2026

Large Nautilus Ammonite Fossil (1 of 11)

Large Nautilus Ammonite Fossil

Feb 27, 2026

Butler County Alabama Ammonite Fossil (1 of 7)

Butler County Alabama Ammonite Fossil

Davis Brothers Auction

Feb 14, 2026

End Chambered Ammonite Fossil (1 of 2)

End Chambered Ammonite Fossil

Fossils & Gemstones of Houston

Feb 22, 2026

Split Ammonite Fossil Pair (1 of 1)

Split Ammonite Fossil Pair

Fossils & Gemstones of Houston

Feb 22, 2026

Similar Sale History

Unlock All Prices

Sold

165ct Cut Opalized Ammonite Fossil Half (1 of 2)

165ct Cut Opalized Ammonite Fossil Half Beautiful specimen approx 2"

Sold

275ct Cut Opalized Ammonite Fossil Half (1 of 2)

275ct Cut Opalized Ammonite Fossil Half Beautiful specimen approx 2"

Sold

1320ct Scarce Large Opalized Ammonite Cut Half (1 of 2)

1320ct Scarce Large Opalized Ammonite Cut Half Excellent natural specimen; tens of millions of years old

Sold

1415ct Scarce Large Opalized Ammonite Cut Half (1 of 2)

1415ct Scarce Large Opalized Ammonite Cut Half Excellent natural specimen; tens of millions of years old

Sold

795ct Scarce Large Opalized Ammonite Cut Half (1 of 2)

795ct Scarce Large Opalized Ammonite Cut Half Excellent natural specimen; tens of millions of years old

Sold

985ct Scarce Large Opalized Ammonite Cut Half (1 of 2)

985ct Scarce Large Opalized Ammonite Cut Half Excellent natural specimen; tens of millions of years old

Sold

Natural History - Cut and Polished Fossil Ammonite (1 of 1)

Natural History - Cut and Polished Fossil Ammonite Jurassic Period, 199-145 million years B.P. A pair of cut and polished fossil ammonite halves, each displaying the gas chambers; possibly Cleoniceras sp. 172 grams total, 95-97 mm (3 3/4 - 3 7/8 in.).

Sold

1910ct Opalized Crystalized Lg Ammonite Cut Half (1 of 2)

1910ct Opalized Crystalized Lg Ammonite Cut Half Excellent large 250m+ year old specimen

Sold

1600ct Opalized Crystalized Lg Ammonite Cut Half (1 of 2)

1600ct Opalized Crystalized Lg Ammonite Cut Half Excellent large 250m+ year old specimen

Sold

Ammonite Fossils Cut & Polished (29 Pc.) (1 of 4)

Ammonite Fossils Cut & Polished (29 Pc.)29 pairs of cut and polished matched ammonite halves for jewelry & artwork.

Sold

Madagascar Split Ammonite Fossil w/ Crystal Formations (1 of 3)

Madagascar Split Ammonite Fossil w/ Crystal Formations East Africa, Madagascar, Jurassic to Cretaceous period, ca. 200 to 66 million years ago. A cut and polished half of an ammonite fossil, revealing the natural and fascinating interior whorl patterns an

Sold

Ammonite Cut & Polished Fossils (30 Pc.) (1 of 5)

Ammonite Cut & Polished Fossils (30 Pc.)30 pairs of cut and polished matched ammonite halves used for jewelry, artwork & more.

Sold

Cut and Polished Fossil Ammonite (1 of 1)

Cut and Polished Fossil Ammonite Jurassic Period, 172-168 million years B.P. A cut and polished ammonite in two halves, distinctive cross section chambers filled with crystals, some iridescence to outer surfaces. 275 grams total, 10.

Sold

Natural History - Cut and Polished Fossil Ammonite Pair (1 of 1)

Natural History - Cut and Polished Fossil Ammonite Pair Cretaceous Period, circa 113-100 million years B.P. Comprising a polished Cleoniceras sp. ammonite cut into halves and showing the internal crystallisation of the gas chambers. 124 grams total, 69 mm

Sold

Cut and Polished Fossil Ammonite Pair (1 of 1)

Cut and Polished Fossil Ammonite Pair Cretaceous Period, Albian Stage, 113-100 million years BP. A cut and polished Cleoniceras sp. ammonite in two halves, displaying the distinctive pattern of the cross-section chambers. 274 grams total,

Sold

Natural History Fossil Fish and Ammonite Group (1 of 1)

Natural History Fossil Fish and Ammonite Group Cretaceous Period, 200-65 million years BP. Group comprising: a small ammonite, cut and polished in two halves, with two small fossil fish specimens, in matrix. 618 grams total, 3.2-14.7cm (1 1/4 - 5

Sold

Ammonite Fossil Group - 37 [147886] (1 of 1)

Ammonite Fossil Group - 37 [147886]6 cut and polished ammonite halves to visualize chambers, on cards, 1.5 x 1.25 x 0.25" to 1.25 x 1.0 x 0.25"; 1 entire with label identifying as Hoploscaphite from Fox Hills formation, South Dakota, o

Sold

POLISHED AMMONITE FOSSIL HALF (1 of 2)

POLISHED AMMONITE FOSSIL HALF POLISHED AMMONITE FOSSIL HALF - (F226) Height: 4 in. by Width: 5 in. by Depth: 1

Sold

Polished Ammonite Fossil Half (1 of 2)

Polished Ammonite Fossil Half Polished ammonite fossil half with great internal crystallization. 4.75" x 6" x .25". 10 ounces.

Sold

Huge 5 1/8" Cut Ammonite Fossil, Amazing Colors, Highly Polished Example. (1 of 10)

Huge 5 1/8" Cut Ammonite Fossil, Amazing Colors, Highly Polished Example.Huge 5 1/8" Cut Ammonite Fossil, Amazing Colors, Highly Polished Example.

Sold

Huge 5 1/8" Cut Ammonite Fossil, Amazing Colors, Highly Polished Example. (1 of 9)

Huge 5 1/8" Cut Ammonite Fossil, Amazing Colors, Highly Polished Example.Huge 5 1/8" Cut Ammonite Fossil, Amazing Colors, Highly Polished Example.

Sold

Opalized Ammonite fossil (1 of 2)

Opalized Ammonite fossil Amazing Opalized Ammonite rainbow color reflections. From Madagascar. size 3" No Reserve Shipping This item ships from Protland, OR.

Sold

Huge 4 1/2" Cut Ammonite Fossil, Amazing Colors, Highly Polished Example. (1 of 6)

Huge 4 1/2" Cut Ammonite Fossil, Amazing Colors, Highly Polished Example.Huge 4 1/2" Cut Ammonite Fossil, Amazing Colors, Highly Polished Example.

Sold

Opalized ammonite fossil polished (1 of 8)

Opalized ammonite fossil polished Opalized rainbow sheen ammonite with high gloss - good condition for ancient fossil -about 250 million years old - 2 x 1 1/2 "

TOP