Natural History - Polished Labradorite Boulder

An exceedingly fine display specimen of labradorite, polished on one side, with blue, yellow, and green 'schiller' on the entire polished side and blue schiller on the unpolished back face. From Madag

A large polished boulder of labradorite from Madagascar, with rich colour play on most faces, principally blues and golds. 2.99 kg, 18cm (7") From Madagascar; from the historic ‘Victorian Museum’

Bloc de labradorite polie Polished Labradorite Boulder Madagascar The brilliant play-of-color, known as labradorescence is due to twinning on a microscopic level when viewed from a variety of direct

Devonian Period, 417-354 million years BP. A rectangular stone block displaying orthoceras fossils, polished on all six faces. 8 kg, 30 x 7 x 14cm (11 3/4 x 2 3/4 x 5 1/2"). Property of a London gentl

Jurassic Period, circa 199-145 million years B.P. A composite plate containing a large number of variously sized ammonites, polished upper face. 835 grams, 24.7 cm (9 3/4 in.). From Madagascar. From a

A serpentine block with wheel-turned pharos model above. 426 grams, 15cm (6"). Property of a North West London gentleman; formerly with a central London gallery in 1990.

Jurassic Period, 199-145 million years B.P. Comprising a composite of various sized ammonites with polished upper surface. 778 grams, 23 cm wide (9 in.). From Madagascar. From a Lincolnshire, UK, coll

A group of six cut and polished circular malachite coasters with pale and dark green banding. From the historic ‘Victorian Museum’ or later collection of Gregory, Bottley & Lloyd (Gregory's); form

A sawn and polished pair of natural agate geodes with several 'eyes' and cavities filled with amethyst crystals, with stands. From the historic ‘Victorian Museum’ collection of Gregory, Bottley &

Each with at least one polished face to reveal the attractive banding; some pierced for threading. 244 grams total, 17-46 mm (5/8 - 1 3/4 in.). From Democratic Republic of the Congo.Ex Mineral Imports

A mixed group of 50 polished mineral 'pebbles'. 1.12 kg total, 31-45 mm (1 1/4 - 1 3/4 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [50, No Reserve]

A large piece of cut and polished malachite with lustrous sheen of pale and dark green, pale crystals between nodules. From the historic ‘Victorian Museum’ or later collection of Gregory, Bottley

Oligocene Period, circa 45 million years B.P. A polished specimen of amber displaying insect inclusions. 0.9 grams, 19 mm (3/4 in.). Property of a Sussex, UK, teacher. [No Reserve]

A group of six polished gemstone eggs including: marble, jasper, fossiliferous limestone, etc. From the historic ‘Victorian Museum’ or later collection of Gregory, Bottley & Lloyd (Gregory's); for

Oligocene Period, circa 45 million years B.P. A polished specimen of amber displaying insect inclusions; Primorskoje mine, Kaliningrad. 6.83 grams, 27 mm (1 in.). From the Baltic Sea Coast, Primorskoj

A mixed group of 50 polished mineral specimens of various types, including haematite, quartz, red jasper, unakite, angelite, and others. 1.19 kg total, 27-44 mm (1 - 1 3/4 in.). Mineral Imports, Londo

A mixed group of 100 polished mineral 'pebbles'. 1 kg total, 20-34 mm (3/4 - 1 3/8 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [100, No Reserve]

A group of five cut and polished amethyst obelisks or massage tools ranging in colour from light to dark purple and with rainbow reflections. From Brazil; from the historic ‘Victorian Museum’ or l

. Mainly translucent with some small rainbow reflections. 83 grams, 37 mm (1 1/2 in.). From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). [No Reserve]

Oligocene Period, circa 45 million years B.P. A specimen of polished amber with insect inclusion. 0.40 grams, 14 mm (1/2 in.). Property of a Sussex, UK, teacher. [No Reserve]

Oligocene Period, circa 45 million years B.P. A polished specimen of amber with insect inclusion. 3.26 grams, 41 mm (1 5/8 in.). English collection formed in the 1990s.UK art market.Ex property of an

A group of polished mineral spheres including: three brecciated jasper, unakite, snowflake obsidian, tiger iron, howlite, sodalite, each in its own labelled white card tray. From the historic ‘Victo

Devonian Period, circa 417-354 million years B.P. Cut and polished from a single fossiliferous block and each side set with a large Goniatite sp. specimen. 3.4 kg total, 15.3 cm high each (6 in.). Fro

Silurian Period, 400 million years BC. A free-standing pillar of orthoceras-rich matrix, with four specimens exposed and polished. 1.4 kg, 23cm (9"). From an important London collection, acquired in t