With cut base, possibly Calycoceras. 1.06 kg, 11.3 cm



From a Cambridgeshire, UK, collection.

A naturally formed marvel displaying dark banding to the outer edges and wide crystal banding to the central areas, two opaque areas of agate resembling an eye mask. 617 grams, 27.5 cm



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

Comprising six cut geode halves with polished cut face, four with a large internal cavity filled with quartz ad calcite crystals; two with an interesting double cavity. 1.06 kg total, 5.3-11.6 cm



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

Comprising thirty-one polished pebbles displaying vibrant pink colour. 943 grams total, 29-41 mm



Ex property of a UK gallery, early 2000s.

Comprising one hundred clear prismatic points. 820 grams total, 26-45 mm



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

A large group of cut geode halves with exposed internal crystal-filled cavities. 644 grams total, 21-40 mm



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

Comprising three teeth set on individual matrices. 776 grams total, 83-94 mm



From a Cambridgeshire, UK, collection.

Comprising twenty dark-coloured pyramidal points. 1.3 kg total, 33-56 mm



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

Comprising six clusters with at least one larger prismatic point, mainly clear to white in colour, one with a yellow hue. 663 grams total, 73-87 mm



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

Polished to expose the internal banding, three freestanding with cut bases; three dyed. 2.32 kg total, 8.7-11.6 cm



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

Comprising three large, almost clear prismatic points with some inclusions. 795 grams total, 10.2-10.9 cm



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

Hollardops mesacristata on a matrix. 154 grams, 72 mm



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