Limestone matrix showing one large leaf on one side and several overlapping fragments on the reverse. 670 grams, 13.5 cm



From a UK private collection since at least 1946. Property of a West London, UK, gentleman.

Crotalocephaline gibbus on a matrix showing characteristic sharp pygidial spines. 219 grams, 93 mm



From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.

Two highly polished translucent slices with brown and grey banding with quartz crystal formation inside, one resembling a 'smiley face'. 478 grams total, 16.1-17 cm



From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.

Tapering specimen with insect and other inclusions. 10.25 grams, 11.1 cm



From a Cambridgeshire, UK, collection.

Comprising: chalcanthite from Planet Mine, La Paz County, Arizona, USA; apophylite from Pune, Maharashtra, India; stilbite from Jalgaon District, Nashik Division, Maharashtra, India; pyrite from Ottawa, Franklin County, Kansas, USA; heulandite from India. 355 grams total, 3.7-10.3 cm



From the property of a Cornwall, UK, gentleman.

Irregular geode matrix with light purple amethyst crystals; the metal branches tipped with polished quartz pebbles. 662 grams, 18 cm



From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.

Boxed group of unpolished dark blue sodalite specimens with white calcite veins. 2.01 kg total, 7-59 mm



From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.

Asaphus lepidurus with a semicircular headshield and tailshield separated by well-defined ribs. 65 grams, 54 mm



From the Putilova River, Volchov, St. Petersburg, Russia. From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.

Comprising two aquatic arthropod showing good detail in the carapace, resting on an irregular matrix. 128 grams, 74 mm



From Lebanon. From a Cambridgeshire, UK, collection.

Comprising three matrices, one with a single specimen, one with two, and the third matrix with two complete and one partial specimen. 475 grams total, 6.6-10 cm



From Colarado, USA. From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.

Attractive group of polished translucent slices showing contrasting bands, two showing quartz crystal formations, and with dendritic inclusions and four with horizontal banding. 795 grams total, 9.2-12.7 cm



From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.

Likely Ceratarges spinosus showing the distinctive protective spines. 190 grams, 79 mm



From a Cambridgeshire, UK, collection.