![Polished Fossil Coral Head Specimen: Devonian Period, circa 417-354 million years B.P. An irregular specimen showing the internal structure. 314 grams, 10.1 cm (4 in.). [No Reserve] From a Cambridgeshire, UK, collection. TimeLine Auction](https://p1.liveauctioneers.com/1191/405225/225127596_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £20-£30
Results for “Fossils and Minerals”
Est. $55-$75
Est. $75-$100
![Quartz Crystal Specimen: An intergrown mass of prismatic crystals on a matrix. 644 grams, 16.5 cm (6 1/2 in.). [No Reserve] Property of an Essex gallery. TimeLine Auctions follows a rigorous vetting process to ensure the auth](https://p1.liveauctioneers.com/1191/405225/225127657_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £50-£70
Est. £40-£60
Est. $40-$50
Est. $10-$2,000
![Polished Fossil Goniatite Group: Devonian Period, circa 400 million years B.P. Comprising three polished examples showing some inner structure. 223 grams total, 63-65 mm (2 1/2 in.). [3, No Reserve] Found Morocco, North Africa. Prope](https://p1.liveauctioneers.com/1191/405225/225127629_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £30-£40
Est. $65-$85
Est. $70-$1,000
Est. $70-$1,000
Est. $100-$150
![Polished Ammonite Coaster Pair: Jurassic Period, circa 199-145 million years B.P. Comprising two composite plates composed of ammonite slices set in resin. 325 grams total, 12 cm each (4 3/4 in.). [No Reserve] From a Lincolnshire, U](https://p1.liveauctioneers.com/1191/405225/225127569_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £50-£70
![Mosasaur 'Marine Dinosaur' Composite Fossil Jaw Fragment Display with Teeth: Cretaceous Period, circa 145-65 million years B.P. A composite matrix set with seven Mosasaur prognathodon teeth. 1.66 kg, 20.5 cm (8 in.). [No Reserve] From Morocco. From a Cambridgeshire, UK, collec](https://p1.liveauctioneers.com/1191/405225/225127527_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £50-£70
Est. $50-$60
Est. $40-$50
Est. $70-$1,000
![Collection of Natural Ruby Crystals: Comprising two tabular, hexagonal crystals and four fragments, one being cut to a rectangular shape. 5.51 grams total, 8-16 mm (3/8 - 5/8 in.). [6, No Reserve] Private collection, London, UK. TimeLine](https://p1.liveauctioneers.com/1191/405225/225127604_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £40-£60
Est. $100-$200
![Fossil Pecopteris Fern Leaves: Carboniferous Period, Pennsylvanian Epoch, circa 300 million years B.P. An irregular matrix containing Pecopteris fossil ferns on both sides. 385 grams, 17 cm (6 3/4 in.). [No Reserve] From USA. From](https://p1.liveauctioneers.com/1191/405225/225127531_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £20-£30
![Polished Fossil Coral Head Heart: Devonian Period, circa 417-354 million years B.P. Cut to a heart shape and polished to reveal the internal structure. 151 grams, 73 mm (2 7/8 in.). [No Reserve] From a Cambridgeshire, UK, collection.](https://p1.liveauctioneers.com/1191/405225/225127635_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £20-£30
Est. $75-$120
![Polished Fossil Coral Head Heart: Devonian Period, circa 417-354 million years B.P. Cut to a heart shape and polished to reveal the internal structure. 166 grams, 72 mm (2 7/8 in.). [No Reserve] From a Cambridgeshire, UK, collection.](https://p1.liveauctioneers.com/1191/405225/225127639_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £20-£30
![Fossil Tyrannosarus Rex Dinosaur Coprolite: Late Cretaceous Period, circa 70-66.5 million years B.P. An irregular mass of fossilised dung. 105 grams, 67 mm (2 5/8 in.). [No Reserve] From a Lincolnshire, UK, collection. TimeLine Auctions follows](https://p1.liveauctioneers.com/1191/405225/225127619_1_x.jpg?height=280&quality=70&sharpen=true&version=1769779778&width=280)
Est. £40-£60
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