Beautiful late 19th Century egg pendant that is almost acorn like with the green guilloche enamel on the top section very like the cupule of an acorn. 
The lower section is enamelled in a pale pink and decorated with a gold diamond set swag.
The egg hinges open to reveal a locket compartment. 
 
length - 25mm
english circa 1880
weighs - 4g
gold - 18 carat
Condition - excellent