"The Nimrud lens, also called Layard lens, is a 3000-year-old piece of rock crystal, which was unearthed by Austen Henry Layard at the Assyrian palace of Nimrud, in modern-day Iraq. It may have been used as a magnifying glass, or as a burning-glass to start fires by concentrating sunlight, or it may have been a piece of decorative inlay."
- Text and image from Wikipedia entry for "Nimrud lens" (accessed 11/11/2015)
Blog Posts and Articles
- "A Crystal Lens’ from Nineveh" (Keith Fitzpatrick-Matthews, 5/7/2007)