Opal and green/purple tantalum earrings, 1976.
Image number: 10305827
Tantalum was first isolated pure in 1903 by the German scientist Werner von Bolton. A heavy blue-grey transition metal, it is particularly useful as a material for surgical implants because of its lack of reaction to body fluids. Tantalum is also used in alloys because of its hardness and resistance to corrosion. The colour of these pieces of jewellery is obtained by heating the metal.
- Image number:
- Science Museum/Science & Society Picture Library
- Date taken:
- 28 October 2003 11:36
- Image rights:
- Science Museum