"There isn't anything in my mind that has the same specialness," says Jacqueline Cullen of the jet she uses in her jewelry designs - this rare fossil is sourced from Whitby, England and was most notably worn by Queen Victoria to mourn the death of Prince Albert. With a modern, more upbeat spin, this handmade 18-karat gold necklace sparkles with 0.35 carats of blackened diamonds.

Shown here with: Stella McCartney Jumpsuit.

• - Hook fastening
• - Due to the natural materials used, some irregularities in surface texture and inclusions may occur
• - The black color of this diamond is the result of an artificial treatment process