Natural History - Large Blue Agate Crystal Cut and Polished Slice.

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

. 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 massive cut and polished agate slice showing bands of blue and brown colour to the border, honeycomb quartz crystals to the centre. From the historic ‘Victorian Museum’ or later collection of Gr

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

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 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]

Comprising lacquered porphyry slice of irregular shape, cut and polished on one side, probably recycled material mined in ancient Roman times between the 1st and 5th century A.D. 917 grams, 28 cm (11

Found 2022 A.D. The cut and polished slice held in a custom-made collector's display box. 51 grams total, 84 mm wide including case (3 3/8 in.). From the Sahara Desert, North Africa. Property of a Sus

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 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 cut and polished fluorite crystal obelisk with bands of green and purple colour. 240 grams, 13cm (5"). From a historic ‘Victorian Museum’ collection; from the stock of Gregory, Bottley & Lloyd (

A cut and polished fluorite crystal with bands of green and white colour. 175 grams, 90mm (3 1/2"). From a historic ‘Victorian Museum’ collection; from the stock of Gregory, Bottley & Lloyd (1981-

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]

Natural mineral crystal cut and polished geodes. Each with it's unique OOAK coloration and design patterns and distinctive shape. No apparent markings. Dimensions: 6 X 4.5 X 3.5 in. Condition: Go

A large cut and polished agate slice with bands of blue, dark red and orange colour. 496 grams, 31.3cm (12 1/4"). From the historic ‘Victorian Museum’ and later collection of Gregory, Bottley & Ll

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

A fine cut and polished agate slice with blue bands and small central cavity with crystal formation, colour enhanced. 544 grams, 24cm (9 1/2"). From a historic ‘Victorian Museum’ collection; from

Large agate geode cross section slice with a smooth high mirror polished finish. OOAK ( one of a kind ) color variations and design patterns seen in this example. Accompanied with a clear plastic stan

Blue Agate free shape polished slice. Weight 13.9 grams. Measured 2 1/4 x 1 3/4 inches, approximately 3.1 mm thick. Stone is dyed and has beautiful crystal formation and banded natural design.

Blue Brown Agate free shape polished slice. Weight 11.1 grams. Measured 2 1/4 x 1 1/8 inches, approximately 3.5 mm thick. Stone is dyed and has beautiful crystal formation and banded natural design.

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

A group of six cut and polished agate slices with bands of purple, blue, green, purple and brown colour, some with honeycomb crystals to the centre, colour enhanced. 394 grams total, 9-12cm (3 1/2 - 4

A fine slice of natural banded agate with numerous colour bands, and with fine bands producing a rainbow effect, the hollow centre lined with quartz crystals. See Bonewitz, Dr. Ronald Louis, Rocks & M

. Each polished to expose the layers of the inner core; felt-backed. 774 grams total, 11-13.5 cm (4 1/4 - 5 1/4 in.). Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). [6, No Reser