a translucent, reddish-orange variety of Chalcedony which
is a type of cryptocrystaline, or fine-grained, Quartz
with a fibrous microstructure. Carnelian is colored shades
of red, orange or brown by the presence of Iron
Oxide (FeO). It is usually
translucent to opaque, rarely fully transparent and usually found as cabochons or
may also be faceted. It is a very attractive material
with colors of bright orange to deep red.
is found in many locations worldwide including Brazil;
Mozambique; Arizona and New Mexico, USA.