A miniature aquamarine snuff bottle, 1850-1900. Photo Bonhams

Of flattened ovoid form, with straight lip and recessed oval foot enclosing a short footrim, the pale translucent stone carved to the front with a flying bat reversed by a cluster of cloudscrolls set off at one side by a coiled dragon; 1 3/8in (3.6cm) high. Estimate: US$1,000 - 1,500