![Polished Fossil Tree Slice: Triassic Period, 251-199 million years B.P. Agatized slice showing attractive patterns, polished on both sides. 437 grams, 15.7 cm (6 1/8 in.). [No Reserve] From a Cambridgeshire, UK, collection. Time](https://p1.liveauctioneers.com/1191/426518/237925183_1_x.jpg?height=280&quality=70&sharpen=true&version=1785755501&width=280)
Est.
£20
-£30
TimeLine Auctions Ltd.Harwich, Essex
Est.
US$975
-US$1,267
Mynt AuctionsNew York, NY
Est.
US$220
-US$400
Fantasy JewelryMuscat, AE
Est.
US$1,079
-US$1,402
BidhausNew York, NY
Est.
US$10
-US$200
ThousandPlanetSathorn, Bangkok
Lazo HeritageSathorn, Bangkok
Est.
£50
-£70
TimeLine Auctions Ltd.Harwich, Essex
Est.
US$767
-US$997
Mynt AuctionsNew York, NY
Est.
US$250
-US$300
Fantasy JewelryMuscat, AE
Est.
US$676
-US$878
BidhausNew York, NY
Est.
US$10
-US$200
ThousandPlanetSathorn, Bangkok
Lazo HeritageSathorn, Bangkok
![Large Cut and Polished Banded Blue Agate Geode Slice Artefact Base: Thick, oval slice of a geode showing contrasting grey banding with some quartz crystals at the centre. 1.07 kg, 20 cm (7 7/8 in.). [No Reserve] From Brazil. Ex Mineral Imports, London, UK. Gregory, Bo](https://p1.liveauctioneers.com/1191/426518/237925275_1_x.jpg?height=280&quality=70&sharpen=true&version=1785755501&width=280)
Est.
£20
-£30
TimeLine Auctions Ltd.Harwich, Essex
Est.
US$572
-US$743
Mynt AuctionsNew York, NY
Est.
US$200
-US$300
Fantasy JewelryMuscat, AE
Est.
US$1,352
-US$1,757
BidhausNew York, NY
Est.
US$10
-US$200
ThousandPlanetSathorn, Bangkok
Est.
US$10
-US$200
Lazo HeritageSathorn, Bangkok
![Very Large Cut Natural Unpolished Fossilised Tree Trunk Slice: Triassic Period, 251-199 million years B.P. Thick section of agatised wood showing some bark detailing on the outside. 1.54 kg, 30.9 cm (12 1/8 in.). [No Reserve] From Madagascar. Ex Mineral Imports,](https://p1.liveauctioneers.com/1191/426518/237925185_1_x.jpg?height=280&quality=70&sharpen=true&version=1785755501&width=280)
Est.
£40
-£60
TimeLine Auctions Ltd.Harwich, Essex
Est.
US$767
-US$997
BidhausNew York, NY
Est.
US$767
-US$997
Mynt AuctionsNew York, NY
Est.
US$200
-US$300
Fantasy JewelryMuscat, AE
Est.
US$10
-US$200
ThousandPlanetSathorn, Bangkok
Lazo HeritageSathorn, Bangkok
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