Natural History - Australian Agate Creek Cut and Polished 'Thunder Egg' Half Group

Two halves of an agate 'thunder egg', each with one polished face and crystals to the exposed inner surface. 290 grams total, 78-80 mm (3 in.). Agate Creek, Australia. Mineral Imports, London, UK. Gre

Two halves of a nodule of Australian 'Thunder Egg', cut and polished to reveal yellow, red and buff colours to the centre. 355 grams total, 83 mm each (3 1/4 in.) Agate Creek, Australia. Mineral Impor

Agate Creek, Australia, 'thunder egg' with 'fantastic bird' in red. Extremely fine condition. Increasingly rare in this size. 711 grams total, 88mm (3 1/2"). From the historic ‘Victorian Museum’ a

A group of six cut and polished agate geode slices; colour-enhanced. 322 grams total, 8.8-10.7 cm (3 1/2 - 4 1/4 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [6, No Reserve]

A group of eight agate geode sections. 3.5 kg total, 85-96 mm (3 3/8 - 3 3/4 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [8, No Reserve]

A group of six polished agate geode slices; colour-enhanced. 396 grams total, 8.7-11.8 cm (3 3/8 - 4 5/8 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [6, No Reserve]

A group of six cut and polished purple agate geode sections, with exposed crystals; colour-enhanced. 1.39 kg total, 69-94 mm (2 3/4 - 3 3/4 in.). Mineral Imports, London, UK.Gregory, Bottley & Lloyd (

A group of four cut and polished agate nodule ends with bands of colour and crystalline growth. From the historic ‘Victorian Museum’ or later collection of Gregory, Bottley & Lloyd (Gregory's); fo

A group of 10 cut and polished natural agate halves. 2.3 kg total, 67-88 mm (2 5/8 - 3 1/2 in.). Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). [10, No Reserve]

A group of five polished mineral 'eggs' in onyx, banded agate, serpentine(?"). 1.3 kg total, 69-80mm (2 3/4 - 3 1/4"). Ex Thompson collection, Devon, UK. [5, No Reserve]

Jurassic Period, 201-145 million years BP. A group of cut and polished ammonite halves revealing the inner chambers, two in old white card trays with A.B. Cotterill Collection, Wollaton, Nottingham, U

Cretaceous Period, 200-65 million years BP. Group comprising: a small ammonite, cut and polished in two halves, with two small fossil fish specimens, in matrix. 618 grams total, 3.2-14.7cm (1 1/4 - 5

A group of twenty-seven natural geode halves with quartz crystals from Brazil, each cut with a polished face. 1037 gram total, 37-70mm (1 1/2 - 2 3/4"). From an old Lincoln Collection [27, No Reserve]

A mixed group of polished mineral 'eggs' including onyx, amethyst(?), serpentine(?"). 484 grams total, 48-64mm (2 - 2 1/2"). Ex Thompson collection, Devon, UK. [4, 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

Large group of cut and polished rocks and geode slabs. Sizes range from 2" to 9".

Each with one polished face to display the internal contrasting banding. 308 grams total, 22-43 mm (7/8 - 1 5/8 in.). From the People's Democratic Republic of Congo.Ex Mineral Imports, London, UK.Greg

Cretaceous Period, Albian Stage, 113-100 million years BP. A group of eight small A-grade cut and polished Cleoniceras sp. ammonites from Madagascar, with the distinctive pattern of the cross-section

Jurassic Period, 199-145 million years B.P. A pair of cut and polished fossil ammonite halves, each displaying the gas chambers; possibly Cleoniceras sp. 172 grams total, 95-97 mm (3 3/4 - 3 7/8 in.).

A large pink agate crystal slice, polished on both faces; colour-enhanced. 484 grams, 23.5 cm (9 1/4 in.). From Antigas, Uraguay.Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [No R

Comprising three transparent slices showing attractive banding. 286 grams total, 9-14 cm (3 1/2 - 5 1/2 in.). Ex Mineral Imports, London, UK.Gregory, Bottley & Lloyd (Gregory's). [3, No Reserve]

A group of 50 cut and polished natural agate slices. 505 grams total, 36-61 mm (1 3/8 - 2 3/8 in.). Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). [50, No Reserve]

. With enhanced pink-colour and also showing translucent to opaque quartz crystals. 539 grams, 23.2 cm (9 1/8 in.). Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). [No Reserve]

A cut and polished agate slice displaying crystals to the exposed inner surfaces; a naturally-occurring smiling face formed in the polished surface composed of two large circular eyes and a crescent-s