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LOT 2539
Tschermigite Mineral Specimen
1 7/8 in. (34.8 grams, 47 mm).
Comprising deep purple pyramidal crystals on a matrix; laboratory grown. [No Reserve]
ProvenanceAcquired from the Bakewell Show, UK, 7 October 2000.
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.
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AUCTIONS:
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Large Cut and Polished Malawi Agate Crystal Geode Pair
Sold for (Inc. bp): £20
Displaying brown, grey, blue and red banding, the internal cavity with lavender-coloured amethyst crystals. 1.2 kg total, 12.5-12.7 cm
From Malawi. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
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Large Rainbow-coloured Carborundum Crystal Display Specimen
Sold for (Inc. bp): £33
A large cluster of silicon carbide showing beautiful iridescence. 1 kg, 16 cm
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.
Carborundum rarely occurs in nature, but is commercially formed by heating carbon and silicon at very high temperatures, producing extremely strong bands of crystals. -
![Cut and Polished Agate Geode Slice Collection [9]](https://timelineauctions.com/upload/images/items/small/227823-s.jpg)
Cut and Polished Agate Geode Slice Collection [9]
Sold for (Inc. bp): £26
Comprising nine polished slices displaying mainly brown, grey and white banding, one with quartz crystal formation to the centre. 1 kg total, 11.5-13.8 cm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.
