1. "Medusa quartz" with gilalite inclusions.
- Author
-
Rondeau, Benjamin and Macri, Michele
- Subjects
- *
QUARTZ inclusions , *X-ray diffraction , *X-ray diffractometers , *ANALYTICAL chemistry , *X-ray spectroscopy , *SCANNING electron microscopes - Abstract
The article discusses the gemological properties of the medusa quartz with gilalite inclusions found in Paraíba State, Brazil in August 2004. The stone exhibited jelly fish-like inclusions which were identified using an Inel CPS 120 X-ray powder diffractometer with a curved detector, combined with a Gandoli single-crystal camera and copper Kα1 emission. Chemical analysis using a Jeol JSM 840A scanning electron microscope equipped with an Oxford Link energy-dispersive detector revealed that the acicular and jelly fish-like inclusions contained silicon and copper.
- Published
- 2005