Photograph of Opal under the microscope- Opal is the birthstone for October and the zodiac sign Libra. Blonde women wore opal necklaces to protect their hair from losing its color. Queen Victoria loved opals and gave them quite often as wedding presents.
All You Can Feel: Images of Recreational Drugs Exposed to Film Negatives by Sarah Schoenfeld
The hardest naturally occurring substance, diamonds are perhaps the most cherished of all gemstones. Like graphite, they are a crystalline form of carbon, the chemical element that provides the basis for all life on Earth.