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Lot 5
Minerals: A Marston Magna marble slice with promicoceras ammonites Somerset, 190 million years old 39cm high by 57cm wide The decorative qualities of this remarkable stone quarried in the Somerset village of Marston Magna were first recognised over 200 years ago. Often referred to as Marston Magna marble, but in reality a limestone from the Jurassic period, it occurs in nodules, which when broken open reveal numerous small ammonites very tightly packed together. When cut and polished, as in this particularly large example, the fossils and surrounding matrix are shown to best effect. The site of the Georgian quarry is not know and only recently have very small deposits been found from this locality.
Lot 65
Fossils: A petrified wood slice with carbon/manganese oxide mineralisation Indonesian, Triassic 34cm Petrified wood is a fossil in which the organic remains have been replaced by minerals in the slow process of being replaced with stone. Special rare conditions must be met in order for the fallen tree trunk or stem to be transformed into fossil wood or petrified wood. In general, the fallen plants get buried in an environment free of oxygen which preserves the original plant structure and general appearance. The other conditions include a regular access to mineral rich water in contact with the tissues, replacing the organic plant structure with inorganic minerals. The end result is petrified wood - a plant, with its original basic structure in place, replaced by stone. Exotic minerals allow the red and green hues that can be seen in rarer specimens. Petrified wood can preserve the original structure of the stem in all its detail, down to the microscopic level. Structures such as tree rings and the various tissues are often observed features, although in petrified wood from Indonesia, tree rings are often less evident due to the lack of seasons in the tropical climate. Petrified wood from Indonesia covers several areas in Banten and also in some part of Mount Halimun Salak National Park. The following 13 lots during the petrification process over millions of years have been mineralised by various elements including manganese, iron and carbon, giving them their distinct and varied colours.
Lot 30
A LATE VICTORIAN SILVER SCENT BOTTLE, with hinged cover and inner glass stopper, engraved with wading birds amongst plants, London 1879, ANOTHER EDWARDIAN SILVER SCENT BOTTLE, with green glass liner, of cylindrical form pierced and engraved with leafage and scrollwork, the hinged cover enclosing a glass stopper, Birmingham 1903, ANOTHER SILVER TOPPED RUBY GLASS SCENT BOTTLE, Birmingham 1900 and an EARLY TWENTIETH CENTURY WHITE METAL LIPSTICK HOLDER, having a cabochon blue stone set push-up thumb piece releasing a hinged front originally inset with a tiny mirror (now absent) unmarked (4)
Lot 74
ART DECO PERIOD PLATINUM AND DIAMOND RING, cross set with three round transitional cut diamonds, the centre stone approx 1ct, the two flanking diamonds each approx 3/4ct, the three stones having a surround of 24 small brilliant cut diamonds, the shoulders each set with a baguette diamond with a surround of seven small brilliant cut diamonds, the whole approx 4.40ct in total, 7gms, ring size 'Q'
Lot 83
TWO SILVER AND STONE SET RINGS; SILVER BANGLE, an oval LOCKET PENDANT, JET BEAD NECKLACE and another, pair of CLOAK LINKING BROOCHES in the form of African native heads, ANOTHER in the form of a paste set spider and a fly and a VICTORIAN OPENWORK OVAL GOLD PLATED BROOCH set with three red stones
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400830 item(s)/page