Images Dated 15th August 2003

Aquamarine crystal

Aquamarine crystal. Aquamarine is a transparent blue or blue-green variety of beryl (beryllium aluminium silicate). The colour is due to trace amounts of iron within the crystal structure. Beryl occurs in many colours; green beryl is termed emerald. The rare, transparent beryl varieties are used as gemstones, while the more common types form the principal ore of the metal beryllium, which is widely used in industrial alloys. The main producer of aquamarines is Brazil. They are also found in Pakistan and the USA

© LAWRENCE LAWRY/SCIENCE PHOTO LIBRARY

Miniature thermal conductivity detector

Miniature thermal conductivity detector. Coloured scanning electron micrograph of a detector that can be used to measure thermal conductivity of gases. It contains a gold wire (upper left to lower right) that is 200 times thinner than a human hair. When a reaction occurs between gases the change in composition results in a change in the temperature and consequently resistance of the wire. This triggers a signal that the reaction has occurred. Such detectors will be incorporated into microreactors to produce small amounts of chemicals. This detector was designed by the German technology company Siemens. Magnification: x670 when printed at 10 centimetres wide

© VOLKER STEGER/SCIENCE PHOTO LIBRARY

The pitbox of Laurent Aiello, Hasser: The pitbox of Laurent Aiello, Hasseröder Abt-Audi, Abt-Audi TT-R. DTM Championship, Rd 7, Nürburgring, Germany

The pitbox of Laurent Aiello (FRA), Hasser?der Abt-Audi, Abt-Audi TT-R. DTM Championship, Rd 7, N?rburgring, Germany. 15 August 2003. DIGITAL IMAGE

© Sutton Motorsport Images