Carnelian Value, Price, and Jewelry Information


carnelian
By Hyperdeath (Own work) [GFDL or CC-BY-SA-3.0-2.5-2.0-1.0], via Wikimedia Commons

The best-known and generally least expensive variety of chalcedony is carnelian. It ranges in color from yellow-orange to rich, near reddish orange, to orangey brown, and varies from semi-opaque to highly translucent.

Carnelian Value

The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.

Carnelian Information

DataValue
NameCarnelian
Is a Variety ofChalcedony
Refractive Index 1.535 to 1.539
Colors Red, orange
Hardness 6.5 to 7
Specific Gravity 2.58 to 2.64
Transparency Translucent, opaque
FormulaSiO2
Pleochroism Absent

The best-known and generally least expensive variety of chalcedony is carnelian. It ranges in color from yellow-orange to rich, near reddish orange, to orangey brown, and varies from semi-opaque to highly translucent. Iron is the source of its color and as a result it can be easily heat treated, (even by the sun’s heat alone,) to darken red tones as the iron is oxidized. You should assume, unless informed otherwise, that any piece of carnelian has been enhanced in this way. Most commercial carnelian comes from India, but it is mined world wide.

carnelian
By Hyperdeath (Own work) [GFDL or CC-BY-SA-3.0-2.5-2.0-1.0], via Wikimedia Commons