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LOT 0405
Cathedral Geode Half with Amethyst and Calcite Crystals
13 3/4 in. (17.35 kg, 35 cm).
The cathedral lined with large deep purple amethyst crystals, white dog tooth calcite crystals emerging from the left corner; mounted on a custom-made display stand.
ProvenanceFrom Artigas, Uruguay.
Property of a London lady.
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AUCTIONS:
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LOT 0405
Cathedral Geode Half with Amethyst and Calcite Crystals
Estimate £2,500 - 3,500€2,900 - 4,060 (for guidance only)$3,380 - 4,730 (for guidance only)
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Spherical Sedimentary Concretion
Sold for (Inc. bp): £20
Naturally formed from hardened sediment with projecting porous, black stone nodules. 647 grams, 10.2 cm
Acquired on the UK art market in the 1990s. From the Dr Ince collection, N.W. London, UK.
A concretion is a compact mass of mineral matter, usually spherical or disc-shaped, and they vary greatly in size. They usually form early in the burial history of sediment, before the rest of the sediment has hardened into solid rock. Concretions occur when a considerable amount of cementing material collects locally around a nucleus, often organic (a leaf, tooth, a section of fossil or shell or dead matter) and commonly a marine invertebrate. -
Quartz Crystal Mineral Display Specimen
Sold for (Inc. bp): £33
A large pyramidal point in light blue colour, displaying some internal iridescence. 150 grams, 52 mm
Property of a North West London, UK, lady. -
Fly and Other Inclusions in Polished Amber
Oligocene Epoch, circa 45 million years B.P.Sold for (Inc. bp): £52
A teardrop-shaped specimen containing a small and larger flying insect together with other inclusions. 2.97 grams, 36 mm
Property of a North West London, UK, lady.
