Information
News
- Cinnabar (vermilion) - Quartz / Opal
- Eclipse / Bumblebee Stone (Calcite with arsenic sulfides)
- Lead in Amazonite - Caution
- Obsidian: natural product versus artificial glass
- Fluorite-Opal-Jasper (»Tiffany Stone«)
- Ye Ming Zhu - luminescent stones
- »Rainbow Calsilica« - a colorful man-made rock
- POLYBERN in a new look
- Snakeskin Agate, Fire Agate and Fire Carnelian
- »GE POL« Diamonds - an overview