carnelian

Carved carnelian chalcedony and marcasite in a vintage sterling silver scarf clip
Photo courtesy of Scott Papper, GIA GG, AJP, CM (NAJA), Global Gemology & Appraisals
Variety:  Carnelian
Species:  Chalcedony
Mohs Hardness:  7 out of 10
Color:  Semi-transparent to semi-translucent orangy red to to brownish red or brownish orange
RI:  1.535 to 1.539 (1.53 or 1.54 spot reading)
Birefringence:  Usually not detectable
SR/DR/AGG:  AGG
Spectrum:  Not diagnostic
Fluorescence:  Generally inert
SG:  2.60 (+0.10 / -0.05)

carnelian facts

Beautiful carnelian cabochon set in a white gold ring with yellow gold floral prongs
Photo courtesy of Scott Papper, GIA GG, AJP, CM (NAJA), Global Gemology & Appraisals

Carnelian is the semi-transparent to semi-translucent, orangy red to brownish red or brownish orange variety of chalcedony.

Carnelian's name is derived from the Latin word for flesh, carne, due to its orangy red color.
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Carnelian Gallery