Carnelian 11.5-13.5mm shell shape beads (ETB01308) Cherry Creek B : 19 x 31

B : 19 x 31 x 8 mm

While blue is the classic sapphire colour

A thunderegg on the other hand is a specific geological structure

which is also Chalcedony is known by many forms

Carnelian 11.5-13.5mm shell shape beads (ETB01308) Cherry Creek B : 19 x 31Carnelian (also spelled cornelian) is a brownish red mineral which is commonly used as a semi precious gemstone. Similar to carnelian is sard, which is generally harder and darker (the difference is not rigidly defined, and the two names are often used interchangeably). Both carnelian and sard are varieties of the silica mineral chalcedony colored by impurities of iron oxide. The color can vary greatly, ranging from pale orange to an intense almost