“En tremblant”, a French term meaning “to tremble”, was first used to describe 18th and 19th century jewellery where parts of the diamond set pieces were attached to a spring loaded “trembler”, to create movement in the jewel when worn. It’s easy to imagine these trembling diamonds being particularly effective in reflecting the scintillating fire of candlelight.
It can be worn as a brooch or mounted to a frame and worn as a tiara. The piece is hallmarked with the “Eagle Head” Gold Small Guarantee mark, introduced in 1838, indicating the piece is of at least 18 karat gold. A makers mark is present, but indiscernible.