Translucent with a thick band of white quartz crystals, dyed to enhance the internal structure. 640 grams, 23.3 cm



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

Comprising two quadrilateral bookend carved from fossiliferous stone, each set with a large Goniatite sp. specimen on a textured background. 3.47 kg total, 16 cm each



From Atlas Mountains, Morocco, North Africa. From a Cambridgeshire, UK, collection.

Cut to a heart shape and polished to reveal the internal structure. 121 grams, 71 mm



From a Cambridgeshire, UK, collection.

Black variety with crystals showing striations, collection number 72. 120 grams, 53 mm



Acquired on the UK mineral and fossil market, since 1970. From the historic mineral collection of Richard Valentine Cain, London, UK, thence by descent. Accompanied by an original historic index file card.

Comprising large chunks of geodes with clusters of amethyst and quartz crystals. 1.88 kg total, 44-67 mm



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

Comprising three Spinosaurs maroccanus teeth; repaired. 52 grams total, 58-61 mm



From Atlas Mountains, Morocco, North Africa. From a Lincolnshire, UK, collection.

The Spinosaurus was both a beachcomber type scavenger and an active hunter taking small stranded Plesiosaurs, Pterosaurs, turtles and large fish.

A tongue-shaped specimen with dimpled surface. 8.44 grams, 44 mm



From Indo-China. Acquired from Friars Square market, Aylesbury, UK, October 2012. 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.

Tektites are lumps of black or dark grey natural glass produced from melted crustal rocks that are caused by large hypervelocity meteorite impacts on sediments.

Comprising irregular polished pebbles displaying white veining. 270 grams total, 13-28 mm



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

Comprising: three with red and white banding; three green dyed with white banding. 625 grams total, 11.7-13.4 cm



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

A long polished droplet containing small insects. 14.6 grams, 19 cm



Private collection, Harwich.

Comprising lustrous brown twinned crystals on sparkly muscovite schist. 147 grams, 80 mm



From Keyvy, Murmansk, Russia. Acquired from Don Edwards, Derbyshire, UK. 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.

Each pebble cut and polished, showing banding and some with a crystal filled cavity. 1.78 kg total, 66-77 mm



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