The gemstone is 28.6 millimetres high and weighs 139.43 carats.
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Related: millimetre
Prev: The equipment includes two black and white cameras that operate with an eight millimetre (8 mm) chip.
Next: Last year his team achieved a milestone when it manoeuvred a 1.5-millimetre bead through a 5-millimetre artery in a living pig.
