September 2019 News

One of the ten PYRO sets: 35 well-characterized specimens – 20 for calibration and 15 for evaluation – mounted in 25-mm epoxy discs.
September 1, 2019
A series of well-characterized specimens, known as the Peabody-Yale Reference Obsidians (PYRO) sets, has been designed to aid with calibrating and assessing X-ray...