Improved Synthetic Gems Are Widely Used in All Kinds of Precision Instruments

Title

Improved Synthetic Gems Are Widely Used in All Kinds of Precision Instruments

Identifier

31728

Abstract

The sapphire stands second to the diamond in hardness. That is why sapphires and their chemical relatives, rubies, are used for the bearings of watches, balances, electric meters and precision instruments needed in industry and war.

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Reference

'Improved Synthetic Gems Are Widely Used in All Kinds of Precision Instruments', New York Times

Cite As

“Improved Synthetic Gems Are Widely Used in All Kinds of Precision Instruments,” Past Periodicals, accessed February 26, 2021, https://unsettlingscientificstories.omeka.net/items/show/21588.