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LOT 2398
Cut and Polished Psaronius Brasiliensis Fossil Fern Slice on Stand
PALEOZOIC ERA, PERMIAN AGE, CIRCA 280,000-250,000 B.P.
5 7/8 in. (1.07 kg total including stand, 14.8 cm).
Cut section from the trunk of an extinct tree fern showcasing the complex central vascular system. [No Reserve]
ProvenanceFrom Brazil.
From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.
Accompanied by a copy of an old typed information slip.
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AUCTIONS:
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LOT 2398
Cut and Polished Psaronius Brasiliensis Fossil Fern Slice on Stand
Sold for (Inc. bp): £72
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Historic Roman Cut and Polished Roman Imperial Porphyry Fragment Group
Sold for (Inc. bp): £364
Comprising cut and polished pieces, probably recycled material mined in ancient Roman times between the 1st and 5th centuries A.D. 270 grams total, 3.3-15.5 cm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.
Mons Porphyrites (today Jabal Abu Dukhkhan) is the mountainous site of a group of ancient quarries in the Red Sea Hills of the inhospitable eastern desert in Egypt, a five-day trip from the Nile during Roman times. They were discovered by Caius Cominus Leugas in 18 A.D., and during the Roman Empire, the mines officially belonged to the emperor and were the only known source of the Imperial Porphyry, Mons Porphyrites. This dark purple stone was associated with royalty and used for prestigious sculpture and architecture. The location of the mines was lost sometime in the 5th century and rediscovered in the early 19th century. Excavations in the area have revealed the well-preserved quarries and the dwelling places of the quarrymen, and also thousands of ostraca have been discovered containing messages that provide details of how the quarrying took place, and of how the highly skilled quarrymen ordered their food. -
![Group of Twenty [20] Complete Unopened Discovery Agate Crystal Geodes](https://timelineauctions.com/upload/images/items/small/255978-s.jpg)
Group of Twenty [20] Complete Unopened 'Discovery' Agate Crystal Geodes
Sold for (Inc. bp): £33
Comprising twenty round-shaped geodes. 1.84 kg total, 40-56 mm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
White Quartz Geode Slice with Amethyst Core
Circa 140-120 million years B.P.Estimate: £800 - 1,000 (+bp*)
Opening Bid: £440
Cut and polished slice showing dense intergrown layer of white quartz crystals, the centre with groups of small lavender-coloured amethyst crystals; mounted on a custom-made display stand. 4.54 kg, 34 x 25 x 2cm, 52 cm including stand
From Artigas, Uruguay. Property of a London lady.
