A pair of Charonosaurus sp. hadrosaur eggs on a matrix retaining evidence of the original leathery surface. 10.35 kg, 32.5 cm wide



Acquired between the 1970s and 1980s. From the private collection of John Watson, Cambridge, UK.

Dinosaur eggs are known from about 200 sites around the world, the majority in Asia and mostly in terrestrial (non-marine) rocks of the Cretaceous Period. It may be that thick calcite eggshells evolved during the Cretaceous (145 to 65 million years ago). Most dinosaur eggs have one of two forms of eggshell that are distinct from the shells of related modern animal groups, such as turtles or birds; however, some eggs closely resemble the type of shells seen in present day ostrich eggs.

An elongated egg in matrix retaining some evidence of leathery surface, probably Macroelongatoolithus xixiaensis, a giant form of Oviraptor. 11.4 kg, 45 cm



Previously from a Hong Kong collection. Ex property of a London, UK, gentleman.

Macroelongatoolithus is an extinct genus of dinosaurs that laid particularly large eggs that could have been up to 60cm long.

A large polished display specimen from the centre of a large geode showing various crystal formations, including: dark and light purple prismatic amethyst crystals, stellate white quartz formations and orange druse on the other side; accompanied by a custom-made display stand. 56 kg total, 51 cm including stand



From Artigas, Uruguay. Property of a London lady.

The polished geode section lined with purple amethyst crystals, large gold-coloured calcite crystals on a bed of red drusy quartz, a ledge of lilac amethyst crystals below; mounted on a custom-made display stand. 8.1 kg total, 44.2 cm high including stand



From Artigas, Uruguay. Property of a London lady.

A large geode specimen, cut and polished with undulating lines, the interior of the geode lined with light and dark amethyst crystals; accompanied by a custom-made display stand. 23.8 kg total, 53 cm high including stand



From Artigas, Uruguay. Property of a London lady.

A very large geode section with polished edges, the interior composed of two interlocking sections, one lined with richly coloured purple amethyst crystals, the other side with orange and white quartz crystals, some double-terminated, some light purple amethyst crystals to the edge wall; accompanied by two custom-made display stands, one tall and smaller. 55 kg total, 83 cm including small stand



From Artigas, Uruguay. Property of a London lady.

A cut geode section with flower-like formations of white, clear and grey quartz crystals, with black hematite(?); accompanied by a custom-made display stand. 1.56 kg total, 24 cm incuding stand



From Artigas, Uruguay. Property of a London lady.

A cut section of a geode with polished edges, lined with well-formed deep purple and lavender coloured amethyst crystals, prismatic quartz crystals, and snowball-shaped formations of calcite with druzy quartz, most amethyst crystals with minute quartz crystals; accompanied by two display stands, one tall and one smaller. 45 kg total, 73.5 cm including smaller stand



From Artigas, Uruguay. Property of a London lady.

A large bowl-shaped piece formed of small lilac amethyst crystals with a stunning central honey-coloured calcite formation resembling a rosette; at the base of the calcite, pink druzy quartz formation; accompanied by a custom-made display stand. 8.19 kg total, 32 cm wide including stand



From Artigas, Uruguay. Property of a London lady.

A boat-shaped cut section of a geode with large blade-shaped white crystals of quartz after anhydrite; accompanied by a custom-made display stand. 2.6 kg total, 32 cm wide including stand



From Rio Grande do Sul, Brazil. Property of a London lady.

The borders polished to emphasise the beautiful agatised layers; the inside cavity lined with purple amethyst, creamy calcites and white quartz, creating a frosted appearance; accompanied by a custom-made display stand. 24 kg total, 64.5 cm high including stand



From Artigas, Uruguay. Property of a London lady.

A substantial rounded geode section lined with rich, deep purple amethyst crystals enveloping white calcite at the base; accompanied by a custom-made display stand. 21 kg total, 45.5 cm high including stand



From Artigas, Uruguay. Property of a London lady.