A Georgian, rose-cut diamond comet brooch, designed as an openwork circle of rose-cut diamonds with engraved scroll surmount and rose-cut diamond terminal. c. 1830, length 2.6cm This brooch is one of many different types produced in the early 19th century to commemorate Halley's comet. Halley's Comet is arguably the most famous comet in history. it was first recorded in 1705 by the astronomer Edmund Halley. As a "periodic" comet, it returns to Earth's vicinity about every 75 years, making it possible for a person to see it twice in their lifetime. It was last here in 1986, and it is projected to return in 2061General patination to the silver and gold mount, rose diamonds have general chips and have an overall grey appearance, no evidence of repair or obvious damage, gross weight 2.2g